Across
- 2. organisms that give birth to young ones and feed them milk
- 4. ------ vs nurture
- 8. process by which fertile land becomes desert
- 9. surface that is either rocky, mountanious,flat and more
Down
- 1. natural home or environment of an animal, plant, or other organism
- 3. the science or practice of farming
- 5. where a community of living organisms live
- 6. planet on which we live
- 7. clearing a wide area of trees