Question: Given the background: Air pollution is harmful to human beings and other living things. About 22 million people die from air pollution each year. Breathing polluted air increases the risk of developing lung diseases such as asthma and lung cancer. Breathing bad air also increases the chances of dying from other diseases. Children are most likely to be affected by air pollution. That's because their lungs are still developing and growing. Children also take in more air for their size than adults do. Some air pollutants damage the environment as well as the health of living things. The type of damage depends on the pollutant. Air pollution can also harm the environment. and the situation: Daniel visited two countries. Switzerland and India. There was almost no air pollution at all in Switzerland, while the air in India was almost impossible to breathe it was so polluted. Answer the following question: Which country had fewer people with increased chances of dying from other diseases?
Answer: Switzerland

Question: Given the background: Before iodized salt was developed, some people experienced a number of developmental difficulties, including problems with thyroid gland function and mental retardation. In the 1920s, we learned that these conditions could usually be treated easily with the addition of iodide anion to the diet. One easy way to increase iodide intake was to add the anion to table salt. This simple step greatly enhanced health and development. Large amounts of iodide ion are also found in seaweed such as kelp (see picture above) and saltwater fish. and the situation: People from two villages ate lots of salt. People from Salt village used regular salt, while people from Sand village people used iodized salt in their diets, after talking to specialists. Answer the following question: Which village had fewer people with enhanced health?
Answer: Salt

Question: Given the background: A large log placed in a fire will burn relatively slowly. If the same mass of wood were added to the fire in the form of small twigs, they would burn much more quickly. This is because the twigs provide a greater surface area than the log does. An increase in the surface area of a reactant increases the rate of a reaction. Surface area is larger when a given amount of a solid is present as smaller particles. A powdered reactant has a greater surface area than the same reactant as a solid chunk. In order to increase the surface area of a substance, it may be ground into smaller particles or dissolved into a liquid. In solution, the dissolved particles are separated from each other and will react more quickly with other reactants. and the situation: Danny went camping and made a fire in the woods. he used large logs he fell a few months back. Bob was camping 300 yards away and he made a fire using small sticks, kindlings and sawdust he had left over. Bob's fire burned fast and bright. Answer the following question: Which person's wood provided more surface area for the fire to take place ?
Answer:
Bob