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: crumple means change shape from smooth into compacted by physical force.

SOLUTION: compacted density.

PROBLEM: Fact: the movement of an air mass over Earth 's surface causes local weather changes.

SOLUTION: air mass front.

PROBLEM: Fact: a prism is used for refracting light.

SOLUTION:
a prism is used for refracting light.

