TASK DEFINITION: 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.
PROBLEM: Fact: optical tools are used for observing materials up close.

SOLUTION: materials.

PROBLEM: Fact: hearing is used for sensing sound by animals.

SOLUTION: animal dog.

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

SOLUTION:
folding an object.