Which of the following best describes mutualism?

Mutualism is defined as a type of symbiotic relationship where both species involved benefit from their interaction. This can take various forms, such as providing each other with resources, protection, or enhanced reproductive success. For example, in the relationship between bees and flowering plants, bees obtain nectar and pollen while enabling plants to pollinate and reproduce. This mutual benefit enhances the survival and fitness of both the bee population and the plant species involved, illustrating the key concept of mutualism.

Other choices describe different types of interactions that do not involve reciprocal benefits. One species benefiting at the expense of another refers to parasitism, while interactions that have no effect on either species would characterize commensalism. The idea of one species harming another relates to predation or competition, highlighting the diversity of ecological relationships.