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: Placental mammals are therian mammals in which a placenta develops during pregnancy.

SOLUTION: human placental.

PROBLEM: Fact: Pedigrees are useful tools for studying inheritance patterns.

SOLUTION: inheritance animals.

PROBLEM: Fact: when an animal moves , chemical energy is converted to mechanical energy.

SOLUTION:
animal fly.