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.
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Question: Fact: if all members of a species cannot produce offspring then that species will likely become extinct.

Answer: extinct gone.


Question: Fact: Viruses are so small that they can be seen only with an electron microscope.

Answer: electron microscope lens.


Question: Fact: using a gasoline engine requires burning gasoline.

Answer:
burning consuming.