Symbiosis is a kind of ecological relationship where two or more species are closely related in terms of their living habits; they reciprocally benefit from these interactions, for example, they provide each part of the symbiosis with nutrients.
There are too many symbiotic relationships in nature, one of them we can find in organisms such as anemones, and clownfishes; in whale sharks and other fish species that tend to seal the oceans with them, and in pollination, being plants and insects, as we can see in the following pictures:
Considering this, we can say that the correct answer to the question is the third one: C. Two (or more) organisms belonging to different species live closely together and have specific interactions.
