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: cross-pollination increases genetic diversity.
cross-pollination.

Fact: Most carcinogens cause cancer by producing mutations in DNA.

cancer can cause death.