input: Please answer the following: Write a multi-choice question for the following article, with the given choices and answer: Article: It takes two to duet , and one question for scientists is how these coordinated performances arise -- in birds. Are they the result of cooperation, a way in which one pair signals to others that they've got it together? Or are they the result of conflict, evolving to avoid one partner's song interfering with the other's? A study of duetting in Peruvian warbling antbirds suggests that it might be a little of both, and that context is everything. Joseph A. Tobias and Nathalie Seddon of the University of Oxford show in Current Biology that sexual conflict can cause the female of a pair that normally cooperates to "jam" the male's song by singing over it. The researchers exposed antbird pairs to recorded songs of other antbirds and monitored the songs the pairs produced. In one experiment, they played the songs of an intruding pair. In this case, the resident pair "both are likely to lose their territory, so both should cooperate," Dr. Tobias said. And they do. They produce a coordinated duet that in effect tells the intruders to keep away. But when the researchers played the song of a single female, the pair behaved differently. "You'd expect the resident female to be highly motivated to defend her position in the partnership," Dr. Tobias said. And that's what occurs. The male sings its heart out, flirting with the single female, and the female of the pair does its best to interfere with the song by singing over it, apparently to make her mate less attractive to the other female. "It's clear that the male doesn't like what she's doing," Dr. Tobias said. The behavior "breaks up what is otherwise a very cooperative situation into a more complicated signal," he added. It's the first evidence of this kind of signal jamming among pairs, Dr. Tobias said. And in that it leads the male to alter its song to avoid the female's interfering notes, it shows that this kind of conflict could, over a long period, drive the evolution of coordinated song. Options: A It wanted to show its singing talent to the partner. B It aimed at keeping the partnership with the male. C It wanted to frighten the other females. D It wanted to make her mate more attractive. Answer: B It aimed at keeping the partnership with the male. Question:
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output: Why did the female bird sing according to Paragraph 4?

Please answer this: Write a multi-choice question for the following article, with the given choices and answer: Article: Alan took an early interest in gardening---first on his grandfather's Yorkshire allotment in Ilkley, and then in his parents' back garden. Small polythene greenhouses appeared in the back garden, and cacti were bought from church markets. Alan left school at fifteen with one 'O' level in Art and took a job as an apprentice gardener in Ilkley Parks Department nursery, studying for his City and Guilds in Horticulture in the evening. He went on to horticultural college at Oaklands in Hertfordshire where he studied for one year full-time, being awarded the National Certificate in Horticultural. This was followed by three years at the Royal Botanic Gardens, Kew, resulting in the award of the Kew Diploma. After two years as supervisor of staff training at Kew, Alan entered journalism where he became first a gardening books editor, and then Deputy Editor of Amateur Gardening magazine. He appeared regularly on BBC Radio and Television in programs such as Nationwide , Breakfast Time, Open Air, Pebble Mill, Songs of Praise, Titchmarsh's Travels, and the Chelsea Flower Show. He presented the 100th edition of The Word for Channel 4, and hosted the quiz show Ask the Family. Gardeners' World and the hugely popular Ground Force, second only to Easterners in the BBC1 ratings, are broadcast as far as Australia, New Zealand and North America. After leaving both programs, Alan worked on two other series for the BBC to be transmitted in 2003 and 2004, one of them a landmark series on the natural history of Britain. Alan writes for the Daily Express, Sunday Express, Radio Times and BBC Gardeners' World magazine, and has more than thirty gardening books to his credit. His four novels, as well as a book about his own life, have been best sellers. Alan, 53, gardens organically, and lives with his wife, two daughters and a medley of animals. Options: A Alan's school teachers were not good at teaching the subject: Botany B when Alan was successful he was working as a journalist of the time C Alan had had four years of training in Horticulture before being a journalist D born as a man of many talents, Alan didn't realize the fact until years later Answer: C Alan had had four years of training in Horticulture before being a journalist Question:
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Answer: Though the author doesn't tell us directly, we can conclude that _ .

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Have you ever asked yourself why you have two eyes instead of one, three, or even hundreds as some insects have? Have you wondered why your eyes are set close together on the front of your face rather than on the sides of your head, as on animals like rabbits, antelopes, and horses? The reasons are simple -- and important to the way you see the rest of your world. Your eyes are like two small cameras. A camera catches an image of an object and records this image in miniature on a small piece of film. Similarly, when you look at something, each eye takes in what it sees and sends this image to the back of the eyeball. From each eye, an optic nerve then sends the image to the brain. Because your eyes are set close together, they view the world from about the same height but from slightly different angles. While your right eye sees an object a little to the right, your left eye sees the same object slightly to the left. Working as a team, the eyes send the images to the part of your brain called the cerebral cortex, which combines them into a single, centered image. Seeing with two eyes working together is called stereoscopic vision. This allows you to view the world in three dimensions, or 3-D. These dimensions are height, width, and depth. Sensing depth allows you to judge the distance between you and the objects you see. It also helps you to adjust to the changing angle at which you see something as you move closer to or farther away from it. As you walk along a sidewalk, for example, seeing in stereo helps you to know how close you are to the street, how far you need to walk to arrive at a certain building, and how close you are to stepping on a rock or a piece of glass. As your body moves, your eyes give you a continual flow of information about where things are in relation to where you are. If images are coming from only one eye, however, only two of these dimensions - height and width - can be sensed. A world seen with one eye is thus two-dimensional, as in a photograph. The... Options: A textbook about animal behavior B popular science or health magazine C professional magazine for doctors D newspaper's local news section Answer: C professional magazine for doctors Question:???
output answer:
This article would most likely be found in a _ .