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.

[Q]: Question: Tropical storms get their fuel from the? Answer: ocean.
[A]: an ocean is a source of heat and moisture for a hurricane

[Q]: Question: If a house is built using a raw material, it can be built with? Answer: branches.
[A]: if something is a raw material then that something comes directly from a source

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