Mutualism: The honeybee pollinates the flower, helping it reproduce. The bee gets nutrients from the flower.
Predation: The killer whale and the seal both eat penguins.
Commensalism: The deer runs through fields of plants and the Burdock plant hitches a ride to spread its seed across the fields. The deer does not mind.
Parasitism: The mosquito drinks blood from humans. Humans can get diseases.