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.

[Q]: Fact: Fish have a centralized nervous system with a brain.
[A]: brain allows thinking.


[Q]: Fact: a planet rotating causes cycles of day and night on that planet.
[A]: day and night cycles sleep.


[Q]: Fact: freezing means changing from a liquid into a solid by reducing heat energy.
[A]:
freezing -freeze.