| A | B |
| ecosystem | all living things and their environment |
| endangered | a species which is in danger of extinction |
| extinct | no longer in existence |
| habitat | the arrangement of food, water, shelter, and space necessary for a species' survival |
| species | a population of individuals that are more or less alike |
| threatened | a species likely to become endangered if it is not protected |
| reintroduction | a wildlife management technique used to place species back into an area where they had disappeared |
| predator | an animal that lives by killing and eating other animals for food |
| prey | an animal that is killed and eaten by other animals |
| conservation | preserving, guarding, protecting natural resources for future generations |
| adaptation | process of making adjustments to the environment |
| Endangered Species Act | a law making it a crime for anyone to sell or transport an endangered species or a product made from one |