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.

Q: Article: Polar bears are born in dens on land and their mother stays with them for the whole winter without eating anything. The mother and the babies come out from the dens around March, _ from a long winter and must immediately go hunting to find food to stay alive. Now, the only hunting they know is to catch seals from floating ice in the open ocean. In March, polar bear mothers and babies have to swim from the land in Spitsbergen to the edge of the polar ice cap. Normally this is a short swim, since in March the polar ice cap is very close to the land, and the polar bears, and even the babies, are good swimmers. However, last year we saw that the polar ice cap had become smaller in size due to global warming. Swimming hundreds of miles, especially when they are hungry and have babies following them, is really hard, and many bears are dying because of starvation. The polar bear population in the Spitsbergen area was once threatened by hunters. In the 1970s, a ban on hunting was imposed and the polar bear population has been steadily increasing from just a few hundred to about 2,000 to 3,000. This was a great success story. However, now, because of global warming, the population is again in danger. If we do not stop making so much carbon dioxide, we will lose these beautiful animals forever. The polar bears are just one example of animals that have become endangered because of man's appetite for energy obtained by burning fossil fuels. All life on earth could be in danger unless we change our ways. What can we do? To reduce the amount of carbon dioxide in the air we must save and make energy without burning coal and oil. Instead, we can use the sun or the wind to generate electricity. We must also cut down on needless driving and turn off things that use electricity when we are not using them. In addition, we have to stop cutting down forests and start planting more trees.
Answer: To catch seals for food.

A: Why do the bears swim to the edge of the polar ice cap?
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Q: Article: Consumers at the Whale Inside Dark Restaurant are led by a waiter with night - vision Goggles . Inside Dark Restaurant in prefix = st1 /Beijing, a table of 30 diners was getting quarrelsome."I'm touching your head!"said one, like a talkative child. "Who just said that?"another replied. Such voices floated across the 90-plus-seat restaurant, but no one could see who was talking, except the waiters, who were equipped with military-grade night-vision goggles. In the new conceptual dining, restaurants are turning off the lights to focus attention on the food. The trend seems to have started inZurichand has since spread all over the world, with diners sitting in _ rooms and, lately, being served by waiters in night-vision goggles. The idea is that by depriving one sense (sight), other senses are heightened. Darkness has other benefits. ''Chinese people tend to be shy,'' said Chen Long, who owns Whale Inside Dark, which opened in January. ''People have found it easy to break the ice here.'' The first dark restaurant, which opened inZurichin 1999, had a simple intention. The goal ''was creating jobs for the blind and handicapped people,'' said the manager. The concept has been popular in Paris, London,Sydneyand elsewhere, offering new variations on sight deprivation, by which people can experience a lot in a completely dark condition. In Beijing, the Whale Inside Dark Restaurant is not only about heightening the sense of taste, but lowering social inhibitions . It is popular with Internet daters, who met on matchmaking Web sites that are spreading throughout China. Diner for two is about 225 yuan, or $29 at 7.76 yuan to the dollar. Eating in the dark is not without its troubles. Instead of family-style dining, food is served on single-serving plates. When each dish arrives, the server guides your hand to the plate and offers helpful tips like, ''This course is eaten with a spoon.'' The style seems to be working . ''People feel a lot more comfortable when they can't be seen by others,'' said Mr. Chen, who is opening a second branch in Shang-hai, ''Couples get to know each other without seeing other's faces.''
Answer: Dining in the dark

A: What's the best title of the passage?
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Q: Article: Playing is a serious business for children. In fact, it's what they do best! Ask them why they do it, and kids will probably say, "Because it's fun!" But it's much more than that. It's also good for them. Studies show that from birth babies begin learning through playing. They use their five senses to get to know their new world. Touching allows them to discover how different things feel. Brightly color1ed toys and clothing help develop a baby's sense of sight. When small children choose which toy to play with, they begin developing their abilities in deciding something. Children love toys that allow them to use their imagination. Sometimes an empty box is more fun than a high-tech toy. That's because a box can become anything a child imagines it to be. Crayons, paints and Ply-Doha are also good because they allow children to create. Traditional building blocks teach important pre-math skills like problem-solving. Playing doesn't become any less important once children start school. _ ? . Kids learn how to share, take turns and play by the rules.
Answer: Because children make friends through playing.

A:
Why is playing a serious business for children?
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