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: cross-pollination increases biodiversity. 
Question: What increases biodiversity?

A: cross-pollination.
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Q: Fact: Protection for the eyes is mandatory in the laboratory. 
Question: What is often mandatory in the lab?

A:
protection for the eyes.
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