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: gills are used for breathing water by aquatic animals.

A: aquatic animals gills.
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Q: Fact: microorganisms can cause infections.

A: infection.
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Q: Fact: Adult sponges are sessile.

A:
sessile immobile.
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