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: Organisms use lipids to store energy.

A: human organisms.
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Q: Fact: protein is used to repair cells by the human body.

A: cells die repair.
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Q: Fact: ink is used for hiding from predators by octopuses.

A:
ink hiding predators.
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