Answer:
Commensalism
Step-by-step explanation:
Commensalism is a biological interaction and benefits between two living organisms x of different species. These two organisms live in a strong and balanced hormonal relationship where each provides a benefit to the other. An example of this can be seen in the question above, where a bacteria lives associated with a plant. This bacteria provides hydrogen for the plant, which allows it to receive part of the sugars formed in photosynthesis.