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: Skin color is a polygenic trait.
[EX A]: Skin color.

[EX Q]: Fact: bad weather decreases visibility while driving.
[EX A]: decreased visibility and driving causes.

[EX Q]: Fact: a vehicle is used for travel.
[EX A]:
travel navigation.