Ecology

2. : a grassy plain in tropical and subtropical regions, with few trees.
5. the action or process of distributing things or people over a wide area.
7. (of a substance or object) capable of being decomposed by bacteria or other living organisms.
9. : a large open area of country covered with grass, especially one used for grazing.
10. : the tidal mouth of a large river, where the tide meets the stream.
11. an animal or person that eats food of both plant and animal origin.
14. the variety of life in the world or in a particular habitat or ecosystem.
15. : the illegal trafficking and killing of wildlife.

1. : the coldest of all the biomes
3. the weather conditions prevailing in an area in general or over a long period.
4. : the aboveground portion of a plant cropping or crop, formed by the collection of individual plant crowns.
6. an animal that feeds on carrion, dead plant material, or refuse.
8. : arid land with usually sparse vegetation
12. the branch of biology that deals with the geographical distribution of plants and animals.
13. the dying out or extermination of a species.