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: Plants exhibit phototropism, or growing toward a light source.
[A]: electricity can produce light.


[Q]: Fact: plasma is formed by electrons separating from atoms in stars.
[A]: electrons separating create energy.


[Q]: Fact: a human requires sleep to be healthy.
[A]:
brainwaves during sleep.