| A | B |
| Predators | consumers that actively hunt other organisms |
| Prey | the organisms upon which a predator feeds |
| Parasitism | a relationship in which one organism feeds on the tissues or body fluids of another |
| Host | the organism on which a parasite feeds |
| Symbiosis | a relationship where two spieces live together closely |
| Commensalism | symbiotic relationship that benefits one species and neither helps nor harms the other |
| Mutualism | symbiotic relationship in which both species benefit |