rank – v. give someone a position on a list of things in order of importance

impact – n. effect on something

habitat– n. the natural environment of an animal or plant

species – n. a group of animals or plants that are similar and can produce young animals or plants

extinct – adj. no longer existing in nature

drought – n. a period of extended dryness caused by a lack of rain

front lines – n. a position of direct and important influence