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: During a prolonged shortage of water, a tree's ability to add extra tissue and grow thick rings is slowed and the tree produces? Answer: thinner growth rings.
[EX A]: as the amount of available water decreases , tree-growth rings will become narrower

[EX Q]: Question: If plants are going to grow, their seeds need to? Answer: travel elsewhere.
[EX A]: plant requires seed dispersal for reproduction

[EX Q]: Question: As water increases in an environment the number of aquatic animals such as zooplankton, nekton, and benthos will? Answer: on the up.
[EX A]:
a body of water is a source of water