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: Passive immunity lasts only as long as the antibodies survive in body fluids.

SOLUTION: antibodies protein.

PROBLEM: Fact: matter vibrating can cause sound.

SOLUTION: cause sound.

PROBLEM: Fact: the mass of an object causes the gravitational force exerted by that object.

SOLUTION:
gravitational force is attraction.