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: Most ecosystems get energy from sunlight.

A: ecosystem habitat.
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Q: Fact: a circle graph can be used to display percents.

A: Graphs are made of.
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Q: Fact: friction causes the temperature of an object to increase.

A:
friction movement.
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