In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.
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Question: Article: Howling is a behavior commonly observed among a wolf nark. An animals, wolves work together to hunt and rely on howling was an important means of communication each other. There are different explants of a wolf's howl and it appears that there may be more to discover. One theory is that wolves howl to bend better together. It's almost as if howling together helps the pack stay together. Perhaps something similar to people feeling a sense of involvement with each other when singing a song together . But this theory may be wrong, explains Fred H. Harington, a professor who studies wolf behavior. Indeed, there have been tines when wolves have been seen one moment howling in a exhorts, and the next, quarreling anions each other. It appears that usually the lowest-tanking menthes of the pack may actually be "punished" for Joining in the churs at times. So is howling a way to strcagthen a social boad or just a way to reconfirm status among its members? ----Why do welves howl for sure? What is cleat, however, is that howling is often used among packmates to locate each other. Hunting grounds are distant and it happens that woloves may separate from one another at times. When this happens, howling appcars to be an ercellent means of gathering. Howling, interestingly, is a contagious behaviour. When one wolf starts to howl, very likely others will follow. This is often seen to occat in the morning, as if wolves were doing some sotr of "roll rall"where wolves all howl togeter to howl, very likely others will follow. This is often seen to occar in the morning, as if wolves were doing w some sotr of "roll call"where wolves all howl together to repotr their pteence.
Answer: The sense of belonging to a group.

Answer: .What the por similarity between wolves' how humaes ting in chorus?

Question: Article: A window is more than just an opening that you can see through. It can affect the way a building looks,how much energy a building USES and even how you feel. Scientists are now working on ncw technologies to create"smart windows". Unlike normal windows,high-tech smart windows can change from clear to dark and back again with the touch of a button --or even automatically as the outside light changes. Smart windows have the power to make the world a cleaner and more comfortable place. Instead of turning on air conditioners ,people could simply _ the windows in a building's empty rooms. With the rooms less bright,they would stay cool,and people would save energy and money at the same time. That's why smart windows are so exciting. Says Claes Granqvist. He's a professor of physics at Uppsala University in Sweden. If you think that you don't care much about windows,you should think again,Granqvist says. Most people who live in developed countries spend about 90% of their time inside buildings and cars. You might spend even more time than that indoors during the winter if you live in a cold climate. Imagine then what it would be like if there were no windows. You'd have no idea what's going on outside. So,the light of the nature is important for improving the way people feel when they stay indoors. The development of smart windows could mean that a lot of air-conditioning systems may no longer be needed. "In the future," Granqvist says "our buildings may look different."
Answer: They can change automatically or by pressing a button.

Answer: About the smart windows.which of the following is NOT true?

Question: Article: Today, Mount Qomolangma's peak is not a lonely place any more. More than 3,500 people have successfully climbed the 8,844m mountain, and more than a tenth of that number reached the peak just over the past year. As more and more people try to test themselves against Qomolangma, many a time the mount can be very crowded. Climbers have complained about waiting for hours in the bottlenecks on the way to the peak. If bad weather strikes, climbers can and do die. But the dangerous crowds aren't the only problem on Qomolangma. All those climbers need to bring a lot of _ --much of them ends up being left on the mountain, sometimes even the peak itself. Mount Qomolangma is becoming the world's tallest rubbish dump. Here's mountaineer Mark Jenkins writing in National Geographic about the state of Qomolangma: "The two standard routes, the Northeast Ridge and the Southeast Ridge, are not only dangerously crowded but also badly polluted." But the good news is that some mountaineers are taking it upon themselves to clean up Qomolangma. Mountaineer Paul Thelen and his friend Eberhard Schaaf are part of the annual Eco Everest Expedition, which has been cleaning up rubbish from base camps to the peak since 2008. So far they've collected over 13 tons of garbage. Some of that rubbish is even being used for a higher purpose. As part of the Mount Everest 8844 Art Project, a group of 15 artists from Nepal collected 1.5 tons of garbage brought down the mountain by climbers. They've changed the cans and oxygen tanks--in one case, part of the remains of a helicopter--into 74 pieces of art that have already gone on exhibition in Nepal's capital. Part of the profit from sales will go to the Everest Peakeers Association, which has helped collect tons of rubbish off the mountain.
Answer: They are often crowded.

Answer:
What do we learn about the bottlenecks on the way to Mount Qomolangma's peak?