Final answer:
The term commensalism is A) a relationship between two organisms where only one benefits
Step-by-step explanation:
Commensalism is a symbiotic relationship between two organisms where one species benefits while the other species is unaffected. It is a form of interaction in which one organism uses another for a purpose other than food.
For example, insects called mites attach themselves to larger flying insects for transportation, and birds feed on insects disturbed by large grazing mammals. These relationships illustrate commensalism because one organism benefits while the other is neither benefited nor harmed.
Therefore commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. The correct answer is A) a relationship between two organisms where only one benefits