Which statement best describes mutualism in symbiotic relationships?

• A. Both species benefit.
• B. One benefits while the other is harmed.
• C. Neither species benefits.
• D. The relationship is always detrimental to the host.

Answer: (A)

Mutualism is a symbiotic interaction in which both organisms benefit from living together. That makes the statement that both species benefit the best description. For instance, bees get nectar while flowers gain help with pollen distribution for reproduction. This contrasts with parasitism, where one benefits at the expense of the other, and commensalism, where one benefits while the other is unaffected. Mutualisms can be obligate (partners rely on each other) or facultative (beneficial but not essential). Because the defining feature is that both organisms gain, this description fits best.