Competition: When two or more organisms attempt to use the same limited resources. In this example, the white tailed deer is competing with the rabbit for berries.
Predation: A predator vs. prey relationship. The predator hunts and kills the prey and uses the prey for food. The predator benefits and the prey is harmed.
Paratism: A parasite harms its host, in this case, a flea is harming a bear by slowly sucking away its energy.
Mutualism: Both species benefit. In this case, the ant benefits because the tree provides as a habitat, and the ree benefits because it gives it protection from any harmful insects.
Commensalism: One species gains, while the other is essentially unaffected. In this example, a monarch butterfly consumes a poisonous chemical known as cardiac glucose. The monarch stores the chemical throughout his lifespan.
Symbiosis: Two species exchange energy or adaptive benefits. In this case, the African oxpeckers feed on the backs of giraffes to eat ticks and other small harmful insects. And the giraffe is willing to sacrifice its blood so they can be clean from ticks and the birds can eat.