Across
- 4. to move into or through sth
- 7. returning an environment to its natiural state
- 8. the fact that an animal hunting other animals
- 10. very steep, or dropping very fast
- 11. consequence, bad effect on something
Down
- 1. to try to make a bad situation better
- 2. new, in perfect condition
- 3. a permanent change in an organism
- 5. lasting for only a short time; temporary
- 6. to become four times as big
- 9. the process of becoming more active or popular again