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: paleontologists study the remains of plants. 
Question: What do palentologists study?

A: plants.
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Q: Fact: water vapor condensing in the clouds causes soil to moisten. 
Question: what does water vapor condensing in the clouds cause?

A: moist soil.
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Q: Fact: a human requires naps to be healthy. 
Question: What requires naps to be healthy?

A:
humans.
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