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.
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Question: Article: Modern man has cleared the forests for farmland and for wood, and has also carelessly burned them. More than that, though, he has also interfered with the invisible bonds between the living things in the forests. There are many examples of this kind of destruction. The harmfulness of man's interference can be seen in what happened many years ago in the forest of the Kaibab plateau of northern Arizona. Man tried to improve on the natural web of forest life and destroyed it instead. The Kaibab had a storybook forest of large sized pine, Douglas fir, white fir, blue and _ . In 1882 a visitor noted, "We, who ... have wandered through its forests and parks, have come to regard it as the most enchanting region it has ever been our privilege to visit." This was also the living place of the Rocky Mountain mule deer. Indians hunted there every autumn to gather meat and skins. The forest also had mountain lions, timber wolves and bobcats that kept the deer from multiplying too rapidly. Then, in 1906, President Theodore Roosevelt made the Kaibab a national game preserve. Deer hunting was forbidden. Government hunters started killing off the deer's enemies. In 25 years' time, 6,250 mountain lions, wolves and bobcats were killed. Before the program, there were about 4,000 deer in the Kaibab, by 1924, there were about 100,000. The deer ate every leaf and twig they could reach. But there was not nearly enough food. Hunting of deer was permitted again. This caused a slight decrease in the deer herd ,but a far greater loss resulted from starvation and disease. Some 60 percent of the deer herd died in two winters. By 1930 the herd had dropped to 20,000 animals. By 1942 it was down to 8,000.
Answer: interfering with natural cycle of forest life

Answer: The destruction of the environment of the Kaibab resulted from _

Question: Article: The place is England. The year is 1928. One of the founding theorists of quantum mechanics , Paul Dirac, is scratching his head because solutions to his equations have _ unexpected results. For the solutions to make sense, he reasons, there must be a particle that has the mass of an electron but the opposite charge. At the time, such a thing was not known to exist. Several years pass before American physicist Carl Anderson observes a "positive" electron, or positron that confirms Dirac's prediction. Antimatter , as the name implies, can be described as the opposite of ordinary matter. Every particle in the universe has characteristics such as mass and charge. With antimatter, the mass remains constant, but the sign of the charge is reversed. All particles have an antimatter counterpart , even the chargeless neutron . Unlike matter, antimatter is not common. Unless you're in the upper atmosphere, or inside a particle accelerator, you're not going to come across it. "Antimatter was not always so rare," Stephane Coutu, Penn State particle physicist says. There was a time when it was as prevalent as matter itself. "Right after the Big Bang ," Coutu explains, "we believe there must have been exactly the same amounts of matter and antimatter...and yet owing to some small asymmetry in the laws of particle interactions, all of the antimatter and most of the matter in the early universe was annihilated . We are left today with the resulting matter-dominated universe." Science fiction is rife with tales of high-energy particle annihilation, and indeed, antimatter weapons have appeared in current bestselling novels. This is unrealistic, Coutu says. "[It] would be very impractical owing to very great difficulties in producing and maintaining significant amounts of antimatter." Technology that uses the properties of antimatter is actually feasible outside of science fiction, however. Positron emission tomography (PET) is a medical technique that can be used to detect cancer, measure blood flow and detect coronary artery disease. While antimatter may never be used as a bomb, it certainly has a positive future in life-saving medical diagnostic tools, the anti-weapon.
Answer: It's not easy to produce and maintain large quantities of antimatter

Answer: According to Coutu, _ .

Question: Article: Eat healthier. Exercise twice a week. Read more books. Lose weight. We make the same resolutions every year. But most of us fail, and quit after only a few days or weeks.Even the most successful among us, those who have climbed to the top of their fields, crash and burn when it comes to personal change. For example, President Barack Obama has struggled with his smoking habit. So why is change so challenging? Are we wired in a way that keeps us from making changes? And do we need the support of others to reach our goals, or can we go it alone? Professionals who help people make-changes in their lives suggest that the change is determined not by one's surroundings, but one's mind.Beginning with small goals or steps usually leads to a bigger pay-off later, they say.And trying to make a change is easier with support from a cheery group of friends, family, or co-workers with shared goals.But they caution that the experience is different for everyone. "People are more likely to make positive changes in their lives not only when their friends do, but when their friends of friends do, and when their friends of friends of friends do," said Nicholas Christakis, a professor of medical sociology at Harvard University."Social networks have this interesting property of magnifying everything, and so taking advantage of your social network ties can result in a magnification of your own efforts. Johnny Augustin understands that well.His goal was to reduce 30 pounds from his 237-pound frame.But the change didn't come easily.He said "I'm a huge procrastinator.There is a desire but I just kept putting it off.I didn't get to do it until the summer."However, Augustin got inspired when he saw his older brother working out.Today, Augustin weighs 190 pounds. Having a positive attitude is one of the keys to making a successful change, according to Judy Zerafa, author of several books based on how people can improve their lives.She emphasized the importance of believing in yourself--and having positive habits, creative imagination, and persistence--to make change happen."Success in overcoming any self-defeating behavior particularly those related to health, finances, relationships and weight loss is almost guaranteed if you learn to reprogram the subconscious images in that part of the mind," Zerafa said in an article.
Answer: people are better able to make changes when they make changes with others

Answer:
According to the passage, Nicholas Chirstakis means that _ .