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.

Article: Science can't explain the power of pets,but many studies have shown that the company of pets can help lower blood pressure and raise chances of recovering from a heart attack,reduce loneliness and spread all-round good cheer. Any owner will tell you how much joy a pet brings.For some.an animal provides more comfort than a husband/wife.A 2002 study by Karen Allen of the State University of New York measured stress 1evels and blood pressure in people-half of them pet owners-while they performed 5 minutes of mental arithmetic or held a hand in ice water.Subjects completed the tasks alone,with a husband/wife,a close friend or with a pet.People with pets did it best.Those tested with their animal friends had smaller change in blood pressure and returned most quickly to baseline heart rates.With pets in the room,people also made fewer math mistakes than when doing in front of other companions.It seems people feel more relaxed around pets,says Allen,who thinks it may be because pets don't judge. A study reported last fall suggests that having a pet dog not only raises your spirits but may also have an effect on your eating habits.Researchers at Northwestern Memorial Hospital spent a year studying 36 fat people and their equally fat dogs on diet-and-exercise programs;a separate group of 56 people without pets were put on a diet program.On average,people lost about 11 pounds,or 5% of their body weight.Their dogs did even better,losing an average of 12 pounds,more than 15%of their body weight.Dog owners didn't lose any more weight than those without dogs but,say researchers,got more exercise overall-mostly with their dogs--and found it worth doing.
Answer: What pets bring to their owners.
What does the text mainly discuss?

Article: While the rest of his family was happily feasting during Spring Festival, Zu Xinming, a Senior 2 student in Shaanxi province, was frowning. "Every time my s leave after dinner, almost half of the dishes are unfinished," he said, and we throw away a lot of food. Nowadays in China, food waste is a widespread problem. Each year, Chinese people throw away the equivalent of about 50 million tons of grain, an amount which could feed 200 million people, according to Xinhua News Agency. One reason is that people are unaware of the issue. "Some of my friends don't care at all when they can't finish the food on their plates," said Zu, "and they even throw it away if they don't like the taste." Gong Tao, an official from the Communist Youth League of China Committee of Central South University in Hunan province, is worried about the decreasing awareness of food waste on his campus in recent years. "Students don't know how much hard work others go through in order to provide their food," Gao told China Education Daily. One deeper factor is the Chinese cultural value of "face". In a Chinese banquet setting, the host feels great shame when guests' plates are empty. "Serving lots of food is the Chinese way of showing respect to guests and displaying generosity," Yu Changjiang, a sociologist at Peking University, told Xinhua. Huge public spending on government banquets is also worsening the situation. Government banquets at the taxpayer's expense have become "a major source of waste", commented People's Daily. The good news is that people are already beginning to take action. On Jan 16, 10 restaurants with 749 outlets in Beijing joined an "eating up" campaign promoted by Xu Xiake, deputy director of China Land and Resources News. These restaurants have begun serving half-sized meals and small dishes. So, how can you help reduce food waste? Discuss with your family regularly about your food preferences and how much you want to eat. Eat all of the food on your plate and in your bowl. And each week, help your parents clean the fridge so that all of the food gets eaten before it goes to waste.
Answer: In Chinese culture, people show their welcome by serving lots of food.
According to the passage, which of the following is true?

Article: In many countries the standard of living enjoyed by their people has increased rapidly in recent years. Sadly, not everyone in these countries is so fortunate and many people in rich countries are homeless. The reasons for homelessness are various, but poverty is undoubtedly one of the main causes. The homeless people may have become jobless and then been unable to pay their rent and so no longer have _ . Often, the fact that unemployed people get help from the government prevents this from happening, but not always. Some homeless people are mentally ill and have no one to look after them. Some are young people who, for one reason or another, have left home and have nowhere to live. Many of them have had a serious disagreement with their parents and have left home, choosing to go to a city and live on the streets. Sometimes they have taken such action because they have been unable to get on with a step-parent. Many homeless people get into the habit of begging to get enough money to stay alive, but many of the general public refuse to give anything to beggars. Often they are moved on by the police, being accused ,whether rightly or wrongly, of forceful begging . There are many who disrespect homeless people. Some cynics declare that homeless people choose to live the life which they lead. But who would willingly choose to live in a shop doorway, under a bridge or in a cardboard box?
Answer: Lack of money.
According to the text, what causes some people to be homeless?