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: Evolution occurs by a sorting mechanism process. 
Question: How does evolution occur?

A: A sorting mechanism process.
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Q: Fact: a platypus lacks a uterus. 
Question: What do platypuses not have?

A: uterus.
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Q: Fact: Greenhouses are used to protect plants using the energy from the sun. 
Question: Greenhouses are used to what, using the energy from the sun?

A:
protect plants.
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