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: If Jimbo is surfing and the waves begin to crest higher, what happens to amplitude of those waves? 
 Answer: increases
[EX A]: The higher the crests of a wave are, the greater the amplitude.

[EX Q]: Question: Reid notices no change in the weather and temperature from 100 years ago. This likely was caused by _____ greenhouse gas levels. 
 Answer: decreased
[EX A]: As greenhouse gases increase, changes will be more extreme.

[EX Q]: Question: When people breathe in their chest becomes 
 Answer: larger
[EX A]:
Exhaling, or breathing out, decreases the size of the chest, which increases air pressure inside the lungs.