In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Q: Article: Cloud seeding is a method of artificially causing clouds to produce precipitation in the form of rain or snow.Cloud seeding has also been used in attempts to modify the severity of hail storms and hurricanes.The effectiveness of cloud seeding remains controversial .but it continues to be used in some regions to try to increase rainfall for agriculture and to build snow packs for water supplies and power production. Cloud seeding was developed by American scientists Irving Langmuir and Vincent Joseph Schaefer during and after World War II.Their work began as an effort to learn more about the buildup of ice on airplane wings, and eventually led them to attempt to create rainfall by releasing several pounds of crushed frozen carbon dioxide into a cloud from an airplane.In this form, the carbon dioxide is called dry ice.On November 13, 1946, the technique appeared to produce snow directly under the cloud; the snow then turned to rain as it fell to the ground. For their experiment, Langmuir and Schaefer selected a supercooled cloud, one in which the water droplets remain liquid in subfreezing temperatures.Their theory was that small grains of dry ice falling through the cloud would cause tiny droplets of water vapor in the cloud to freeze into crystals that attracted more water vapor.Their theory proved to be correct and eventually the crystals became heavy enough to fall from the cloud as snow.As the snow reached the warmer temperatures closer to the ground, it melted and became rain. Another scientist, Bernard Vonnegut, produced a method of cloud seeding using silver iodide .He used particles of silver iodide because its crystal structure resembled that of ice in clouds.Silver iodide also had practical advantages over frozen carbon dioxide It could be stored at room temperature and did not require an airplane as a delivery mechanism.Instead, silver iodide crystals could be fired by cannons high into the air, where wind carried them into the clouds.
Answer: it is similar

A: Bernard chose silver iodide as a method of cloud seeding because _ .
****
Q: Article: From a very early age, some children show better self-control than others. Now, a new study that began with about 1,000 children in New Zealand has tracked how a child's low self-control can predict poor health, money troubles and even a criminal record in their adult years. Researchers have been studying this group of children for decades now. They observed the level of self-control the youngsters displayed. Parents, teachers, even the kids themselves, scored the youngsters on measures like "acting before thinking" and "Persistence in reaching goals." The study led by Moffitt of Duke University and colleagues followed 1,000 children from birth to age 32 in Dunedin, New Zealand. "The children who had the lowest self-control when they were age three to ten, later on had the most health problems in their 30s," Moffitt said,"and they had the worst financial situation. They were more likely to have a criminal record and to be raising a child as a single parent on a very low income." Moffitt explained that self-control problems were widely observed, and weren't just a feature of a small group of misbehaving kids. Moffitt said it's still unclear why some children have better self-control than others, though she said other researchers have found that it's mostly a learned behavior, with relatively little genetic influence. But good self-control can be set to run in families because children with good self-control are more likely to grow up to be healthy and prosperous parents. But the good news, Moffitt said, is that self-control can be taught by parents, and through school curricula that have been shown to be effective.
Answer: adopt negative behaviors

A: Children with low self-control are more likely to_.
****
Q: Article: Sometimes doing something for yourself - even shopping--can _ . That's the case at charity shops and non-profit stores such as Ten Thousand Villages which helps provide skilled workmen with money in developing countries. Their handicrafts are sold throughout North America in 180 stores, 95 of them operated by Ten Thousand Villages. "People come into the store because we have a lot of interesting things, but then they're drawn to us by the mission ," says organization spokeswoman Juanita Fox. "It just feels good to be making a difference when you're buying something." In the Alexandria, Virginia shop, generals display windows draw you in. They are filled with practical, attractive home furnishings in blue and white, all international in mood. Once inside though, it's clear that this isn't just another import store. On the wall behind the cash register is the following note: "Ten Thousand Villagers provides necessary, fair income to Third World people by marketing their handicrafts and telling their stories in North America. Your Buying Makes a Difference. " The store was opened in 1994 as part of a network of shops across the USA run by the Mennonite Church, which is based in Akron, Pennsylvania. Currently, 60,000 skilled workmen from 32 countries provide goods to the stores, with all proceeds re-invested in the organization. Management of the Alexandria shop is overseen by an all-volunteer board of directors. More than 40 additional volunteers help doing everything from working the register to unpacking stock. Maria Yannopoulos got involved after visiting a store and getting to know another volunteer. "Since we are non-profit, we are really looking for value because the more we sell, the more jobs we can create. Giving someone job rather than charity helps in so many ways. "
Answer: they can find something interesting

A:
A large number of people visit Ten Thousand Villagers because _ .
****