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: soil is formed by? Answer: animals stepping on dead leaves and crushing it into bits.
[EX A]: soil is formed by rocks eroding

[EX Q]: Question: Hummingbirds take what with them? Answer: Pollen.
[EX A]: when pollen sticks to a hummingbird , that pollen will move to where the hummingbird moves

[EX Q]: Question: Two parakeets, each in a separate house, each in a windowless room, may share information through? Answer: squawks.
[EX A]:
sound can be used for communication by animals