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

[EX Q]: Fact: Cell division is how organisms grow and repair themselves.
[EX A]: Cell division mitosis.

[EX Q]: Fact: Butter is a fat that is a solid at room temperature.
[EX A]:
butter fat refrigerate.