Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: A visual "copy" of an object that is formed by reflected or refracted light is called image.

A: A visual "copy" of an object that is formed by reflected or refracted light is called what?
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Q: Instead of heat, organisms use catalysis to speed up reactions.

A: Instead of heat, organisms use what to speed up reactions?
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Q: Benzoic acid type of acid is often used as a preservative for acidic foods such as fruit juices.

A:
What type of acid is often used as a preservative for acidic foods such as fruit juices?
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