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: changes in the pH of soil can cause plants to die.

A: change ph soil.
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Q: Fact: Cells are the microscopic building blocks of organisms.

A: building blocks bricks.
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Q: Fact: burning fossil fuels increases the carbon in the atmosphere.

A:
carbon atmosphere.
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