Answer:
The correct answer is - rhizobia bacteria, found in nodules of plants and receive nutrition and shelter from host plants.
Explanation:
Rhizobia is the bacteria that form nodules in the legume plants that help in biological nitrogen fixation. These bacteria are present in the nodules which is a special structure that where they fix atmospheric nitrogen in the usable form for plants.
They live in symbiosis with the legume plants as they get nutrition and shelter from host and provide fixed form of nitrogen.
Thus, the correct answer is option - rhizobia bacteria, found in nodules of plants and receive nutrition and shelter from host plants.
