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: Bacteria can cause food to spoil. 
Question: What causes food to spoil?

A: Bacteria.
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Q: Fact: When vapor moves from bushes into the atmosphere, transpiration occurs. 
Question: What happens when vapor moves from bushes into the atmosphere?

A: transpiration.
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Q: Fact: comparators, flats, and microscopes could be used for observing materials up close. 
Question: comparators, flats, and microscopes could be used for observing materials how?

A:
up close.
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