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: Viruses often infect bacteria.
[A]: bacteria define.


[Q]: Fact: a flower 's purpose is to produce seeds.
[A]: animals seeds.


[Q]: Fact: an animal usually requires a warm body temperature for survival.
[A]:
animal warm temperature survival.