A bee feeds on nectar and carries pollen between flowers. Both species gain. What is this called?

1. The bee gains food in the form of nectar from the flower. 2. The flower gains because its pollen is carried to another flower. 3. When both species gain from living together the relationship is mutualism. 4. In parasitism one species is harmed, which is not what happens here. _Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), Types of interactions_