Answer:
Mutualism: Humans have helpful bacteria in the intestines. Both the bacteria and humans benefit from this interaction. The bacteria help humans digest food. At the same time, the bacteria obtain nutrition from the intestines of the humans. Another example of mutualism is the relationship I have with my pet cat. We both benefit because I give the cat food, shelter, and good care. Spending time with my cat helps me calm down and relax.
Commensalism: Certain species of mites live on human skin and feed on dead skin cells and oils secreted by the skin. People are neither benefited nor harmed by mites. Mites benefit from the relationship. So, humans have a commensal interaction with some species of mites.
Parasitism: Last week, a tick bit my brother. The tick benefited from the relationship because it fed on my brother’s blood. However, it harmed my brother because the bitten area became sore. The tick also exposed my brother to the diseases it was carrying.
Step-by-step explanation:
Edmentum/PLATO