In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.

[EX Q]: Question: Why are there more deer when there's a lot of rain? Answer: abundant water means more vegetation.
[EX A]: the increase of something required by an organism has a positive impact on that organism 's survival

[EX Q]: Question: A person wants to turn on an MP3 player, so they complete a circuit by? Answer: pressing a button.
[EX A]: pushing a button sometimes completes a circuit

[EX Q]: Question: a decline in the number of predators often leads to? Answer: a rise in the number of prey.
[EX A]:
as population of predators decreases , the population of prey will increase in an environment