instruction:
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.
question:
Question: An example of migration is? Answer: when flocks relocate.
answer:
An example of migration is birds flying south in the winter


question:
Question: Two felled trees, split in twain, with the same number of rings, means they're the same? Answer: age.
answer:
a tree growing a tree-growth ring occurs once per year


question:
Question: As a lake increases in size, there are more? Answer: catfish.
answer:

as water increases in an environment , the population of aquatic animals will increase