A predator is an organism that eats another organism. The prey is the organism which the predator eats. Some examples of predator and prey are lion and zebra, bear and fish, and fox and rabbit.

What is a predator/prey relationship called?

Predation is an interaction in which one organism, the predator, eats all or part of the body of another organism, the prey. Herbivory is a form of predation in which the prey organism is a plant. Predator and prey populations affect each other's dynamics.

Is it a predator or a prey?

If an animal eats other animals, it's a predator. If an animal is eaten by other animals, it's prey.