Science

2. their physical environment.
5. The plants of a particular reign, habitat or geological
6. The process of eroding or being eroded by natural agents.
7. A biological community of interacting organisms
9. Is any number of the group Eukaryote organisms.
10. land consisting of marshes and swamps, suitable land.
11. A series of military operations intended to achieve a goal, confined to a particular area or involving a specified type of fighting.
12. A grassy plain in tropical and subtropical reigns, with few trees.

1. A book or other work detailing the animal life area region.
3. Removal of trees to make room for something else.
4. The process by witch green plants and certain organisms transforms light energy into chemical energy.
8. Land covered with trees.