| A | B |
|---|
| school | a group of one kind of fish that moves together |
| pride | a group of lions |
| troop | a kind of group in which animals such as baboons live |
| colony | a kind of animal group in which each member has a different job |
| symbiosis | a special way in which two different kinds of animals live together |
| parasite | an animal that is helped by living with another animal that harms |
| host | an animal that is harmed by a parasite |
| behavior | the way a living thing acts |
| instinct | a behavior that an animal has at birth and does not need to learn |
| reflex | a simple, automatic behavior |
| stimulus | the cause of a behavior |
| response | a behavior caused by a stimulus |
