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: a telephone is used for communication by humans over long distances.
[EX A]: communication convey.

[EX Q]: Fact: Nephrons are the structural and functional units of the kidneys.
[EX A]: Nephrons cause.

[EX Q]: Fact: water causes refraction of light.
[EX A]:
refraction of light.