Consider a situation in which a plant provides a nodule on its roots to house and feed nitrogen-fixing bacteria; the nitrogen-fixing bacteria in turn supply nitrogen for the plant. This is an example of .

a form of symbiotic relationship: mutualism

Explanation:

Mutualism is a form of symbiotic relationship in which both organism benefit in the relationship. Other forms of symbiotic relationship includes parasitism and commensalism. An example of mutualism is the presence of the nitrogen fixing bacteria eg Rhizobia found in the root nodules of leguminous plants that fixes nitrogen which is utilized by the plant. While the plant in turn products carbon which is utilized by the bacteria and also provide an habits for the bacteria.