In this task, you need to write a topic word from the given fact. The topic word must have at least one word overlap with the given fact. The topic word often involves adding a new word from a related concept. In your topic word, use at least one word from the given fact. Topic words with two or more words work best.

Q: Fact: Insulin is a hormone that helps cells absorb sugar from the blood.

A: insulin diabetes.
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Q: Fact: a mirror is used for reflecting light.

A: light rays.
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Q: Fact: erosion causes deposition.

A:
deposition erosion soil.
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