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: when a metal rusts , that metal becomes orange on the surface.

Answer: metal iron.


Question: Fact: Collar cells have tiny hairs that trap the particles.

Answer: Collar cells tiny hairs.


Question: Fact: Food consists of organic molecules that store energy in their chemical bonds.

Answer:
beef food.