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: the ovaries are used in reproduction.
[A]: humans reproduction.


[Q]: Fact: Monotremes are mammals that reproduce by laying eggs.
[A]: hatch reproduction egg.


[Q]: Fact: Heterotrophs are living things that cannot make their own food.
[A]:
Heterotrophs.