In this model, species A carries the pollen of species B from flower to flower, and in return species A obtains food from those flowers. The scenario states that both species end up better off. What is this interaction called?

Explanation

The scenario states a benefit for both parties, which is the definition of mutualism. The one-sided relationship in which the second party is merely unaffected fails here, because species B gains pollen transport rather than staying unaffected.