Pick your answer from: 1. plants. 2. bears. 3. babies. 4. insects. 5. humans. 6. animals. 7. goats. 8. oxygen.

Fact 1: Mammals breathe with the help of a diaphragm. Fact 2: All humans are mammals. Given the two facts above, what breathes with the help of a diaphragm?
Answer:
5.