What are Mutualism, commensalism, Parasitism, and Predator-Prey?

Mutualism - two organisms that benefit from each other

Commensalism - one organism benefits, one isn't harmed

Parasitism - a parasite benefits from and harms a host

Predator-Prey - a predator (animal that kills another for food) kills a prey (the animal it likes to eat) and eats it