Mutualism, where both organisms benefit. - Commensalism, where one organism benefits while the other organism is not harmed. - Parasitism, where one organism benefits and causes harm to the other organism. Mutualism. This is a beneficial relationship to both partners of different species living together. read more
Parasitism is the relationship between two different organisms in which one receives benefits from the other by causing damage to it. An example of parasitism is a boreal forest/taiga biome is when a winter tick hitchhikes on a moose's back. read more