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.

Fact: folding an object causes that object to change shape.
folding an object.

Fact: Most species go through larval stages after hatching.
larval stage.

Fact: Amphibians have permeable skin that easily absorbs substances from the environment.

Amphibians skin.