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: Nephrons are the structural and functional units of the kidneys.
Nephrons cause.

Fact: Hair helps to insulate and protect the body.
body.

Fact: the sun causes water to evaporate more quickly by adding heat.

adding heat quickly evaporate sun.