What do we call the symbiotic relationship between certain plants and nitrogen-fixing bacteria?

The symbiotic relationship between certain plants and nitrogen-fixing bacteria is termed mutualism because both organisms benefit from the interaction. In this relationship, nitrogen-fixing bacteria, often found in the root nodules of legumes, convert atmospheric nitrogen into forms that plants can use for growth, such as ammonia. In return, the plants provide the bacteria with carbohydrates and a suitable environment to thrive. This mutual benefit enhances soil fertility, promotes plant health, and supports agricultural productivity by enabling plants to access essential nutrients they would otherwise lack.