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.

Q: Question: Mona lives in a country with a lot of food available. If a natural disaster strikes and the food supply is cut off, what will happen to the birth rate in her country? 
 Answer: decrease

A: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration.
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Q: Question: Fred found a longitudinal wave. The particles are getting further apart. The amplitude is 
 Answer: decreasing

A: The closer together the particles in a longitudinal wave are, the greater the amplitude.
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Q: Question: As a boy grows to a man and his larynx grows larger, his voice gets 
 Answer: deeper

A:
The voice becomes deeper as the larynx in the throat grows larger.
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