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: a telephone is used for communication by humans over long distances.
communication convey.

Fact: Marine species live mainly in shallow coastal waters.
Marine means.

Fact: Chemical digestion occurs mainly in the small intestine.

Chemical digestion.