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: Glacier melt? Answer: is an effect of an abundance of CO2 in the environment.
[EX A]: if the atmospheric temperature rises then the glaciers will melt

[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: Some birds live in? Answer: large area dominated by trees.
[EX A]:
some birds live in forests