Answer:
Mutualism-
*Humans and Plants
(We breathe out carbon dioxide then the plants absorb it then release oxygen.... etc.) Humans and plants both benefit from this relationship
Commensalism-
*Killdeer Birds and Cape Buffalo
(the Killdeer Bird lies down on the buffalo and the buffalo protects the Bird. But the bird DOES NOT harm the buffalo.) Birds benefit, but Cape Buffalo is not affected.
Parasitism-
*Ticks and Humans
(The ticks suck the blood and is therefore benefited, but does not benefit the human, but harms them instead.) The ticks benefit, but humans are harmed.