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1. How do animals communicate with each other?

2. What do animals use their strong sense of smell for?

3. How far can some animals smell their partners?

4. What do animals do when they want to show friendship?

5. What does an animal raising its hair usually indicate?

6. Which of these is NOT used by animals to send messages?

7. What is the purpose of animals baring their teeth?

8. Which type of message do animals often send through sounds?

9. How does the human language differ from animal communication?

10. What is the meaning of "complex" in the context of human language?

11. What do animals use their body posture for?

12. What is one way animals use their sense of smell?

13. What do animals use as a warning sign?

14. Why is human language considered unique?

15. Which animal behavior is NOT mentioned in the chapter?