What are examples of some organisms that have symbiotic relationships?

I don't usually make it a practice to answer questions that could appear to be for homework assignments, as I think yours is, but as my interest lies partially in this area to I chose to answer.

A symbiotic relationship is when two organisms of different species "work together. Each organism was part of the other's environment, so as they adapted to their environment, they "made use of" each other in a way that benefited both.

Here is one example of a symbiotic relationship:

The bee and the flower. Bees fly from flower to flower gathering nectar, which they make into food, benefiting the bees. When they land in a flower, the bees get some pollen on their hairy bodies, and when they land in the next flower, some of the pollen from the first one rubs off, pollinating* the plant. This benefits the plants. In this symbiotic relationship, the bees get to eat, and the flowering plants get to reproduce.

Any mammal that has 'parasites' (small fish, birds, etc.) accompanying its progress while eating.

Ants and organisms