Across
- 3. a natural desire to eat
- 6. to increase greatly in number
- 12. the act of leaving a place
- 13. a state of complete disorder
- 14. in a sudden and noticeable way
- 15. an animal that lives in a particular place
- 17. a device used for catching animals
- 18. to increase suddenly and rapidly
- 20. the gradual destruction of soil or rock by wind or water
- 21. a rodent that often lives near humans
Down
- 1. located at an equal distance between two points
- 2. after something else has happened
- 4. the protection of nature and natural resources
- 5. to become smaller or fewer
- 7. plants in general
- 8. to fall down suddenly
- 9. the natural home of a plant or animal
- 10. a tiny organism that causes disease
- 11. a small parrot with a long tail
- 16. the body’s ability to resist infection
- 19. a black and white seabird that lives in cold regions