| Term | Definition |
| species | a class of living things of the same kind and with the same name |
| extinction | the state of a certain grourp of animals or plants no longer existing: died out |
| endangered | in danger of extiction |
| population | the total number of organisms that live in a certain place |
| habitat | the place where an animal or plant naturally lives or grows |
| commercial | having to do with using somthing to make money , as in selling |
| development | using open land to build houses, apartment buildings, or businesses |
| overgraze | to allow animals to feed on grass so long that the grass cover and pastureland is destroyed |
| barren | an area of land that has no grass or trees |
| tropical | having to do with either of two regions that are near the equator and are very hot and rainy |
| rain forests | a large, very dense forest in a region where rain is very heavy throughout the year |
| primates | any of the highest order of mammals, including human beings, apes, and monkeys |
| poach | to hunt illegally |
| conservation | the official protection and care of forests, rivers, and other natural resources |
| reserves | park land that is set apart to be used for a special pupose such as for forests or animal protection |