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 person can charge something which passes energy through it by? Answer: hooking it up.
[A]: when an electrical conductor is plugged into an outlet , a circuit is completed


[Q]: Question: herbivores do what with plants? Answer: snack on them.
[A]: herbivores only eat plants


[Q]: Question: Which substance is likely present for the birth of a mountain? Answer: magma.
[A]:
mountains are formed by volcanoes