ANIMALS

1. VERTEBRATES

2. They have got a backbone

3. are classified into

4. MAMMALS

5. FISH

6. BIRDS

7. AMPHIBIANS

8. REPTILES

9. are classified into

10. INVERTEBRATES

11. They haven't got a backbone

12. CNIDARIANS

13. WORMS

14. ARTHROPODS

15. MOLLUSCS