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.
--------
Question: Fact: living things all require energy for survival.

Answer: energy food.


Question: Fact: using renewable resources to generate power reduces greenhouse gases.

Answer: greenhouse gas carbon.


Question: Fact: Smog contains particulates.

Answer:
particulates air.