Nature

4. the branch of biology dealing with the relations and interactions between organisms and their environment, including other organisms.
6. the gaseous envelope surrounding the earth; the air
8. capable of decaying through the action of living organisms
10. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years.

1. a period of dry weather, especially a long one that is injurious to crops
2. the part of the earth's crust, waters, and atmosphere that supports life
3. diversity among and within plant and animal species in an environment
5. an animal, especially a nonhuman
7. a system, or a group of interconnected elements, formed by the interaction of a community of organisms with their environment
9. a state of equilibrium or equipoise