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: A team has pizza after a game, and they eat most of it, but leave the rest of the pizza out. The pizza is later inedible because of? Answer: lack of food preservation.
[A]: microorganisms cause food to spoil


[Q]: Question: The population of plants will go down if? Answer: there's less liquid around.
[A]: as available water decreases , the population of plants will decrease


[Q]: Question: A bird species may decide to relocate to hotter areas when weather? Answer: cools.
[A]:
migration is when animals move themselves from a cooler climate to a warmer climate for the winter