Answer:
E. coli within the large intestine
Explanation:
A symbiotic relationship is known to be a relationship between two organisms. In this relationship, one organism may benefits and the other suffers[ Parasitism} or both organisms benefit [ mutualism], while one organism may benefit and the other neither benefits nor suffers[ commensalism].
Mutualism is an example of symbiotic relationship where the two organisms involve benefits.
In this case, Man benefit from the presence of E, coli in the large intestine because it keeps the digestive system healthy, help in the digestion of food and the production of vitamin K which helps in blood clotting. The E. coli also benefits because there is availability of nutrients that it needed.
