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: Insects may live in large colonies and have complex social behaviors.

SOLUTION: insect arthropod.

PROBLEM: Fact: a delta is formed by deposition of sediment at the mouth of a river by water fanning out.

SOLUTION: delta greek.

PROBLEM: Fact: Migration is a type of movement that changes population size.

SOLUTION:
migration animals.