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: a measuring cup is used for measuring the volume of substances.

A: liquid volume.
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Q: Fact: plant reproduction often requires pollen.

A: bees carry pollen.
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Q: Fact: faulting of rock in Earth 's crust causes earthquakes.

A:
Earthquakes are shaking.
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