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.

[EX Q]: Fact: an electron microscope is used for seeing very small objects by making them appear bigger.
[EX A]: atoms are small.

[EX Q]: Fact: if an object is kicked then force is exerted on that object.
[EX A]: exerting force requires energy.

[EX Q]: Fact: Mammals took advantage of the extinction of the dinosaurs.
[EX A]:
dinosaur extinction asteroid.