In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[EX Q]: Question: Mona lives in a nation that uses a lot of fossil fuels. What would happen to her countries levels of air pollution if they were to decrease their usage?
Answer: decrease
[EX A]: Because richer nations use more fossil fuels, they also cause more air pollution and global warming than poorer nations do.

[EX Q]: Question: A smoker's body works _____ just to get needed air.
Answer: more
[EX A]: When a person smokes there are chemicals released by the tobacco that enter the lungs. Because the lungs have to work harder to remove the chemicals, the body has to work harder to get the air needed to survive.

[EX Q]: Question: If valence electrons are far from an atom's nucleus, the atom is likely
Answer: bigger
[EX A]:
In bigger atoms, valence electrons are farther from the nucleus.