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.

Fact: Hair is a fiber that is found only in mammals.
hair auburn.

Fact: Bacteria are the most diverse and abundant group of organisms on Earth.
Bacteria names.

Fact: Smog contains particulates.

particulates air.

