Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.

Q: Fact: Exercise can teach animals how to behave. 
Question: What can teach animals how to behave?

A: exercise.
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Q: Fact: when a lake receives too much water, a flood occurs. 
Question: When does a flood occur in a lake?

A: after too much water received.
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Q: Fact: Hearing is used for detecting prey and avoiding danger by animals. 
Question: What is used for detecting prey and avoiding danger by animals?

A:
hearing.
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