The correct example that shows a relationship in which both organisms benefit is:
An African wasp Certolsolen arabicus pollinates a fig tree Ficus sycomorus as it eats the tree's nectar.
In this relationship, the wasp benefits by obtaining nectar for food, while the fig tree benefits from being pollinated, which aids in its reproduction. This type of mutualism is a classic example of a beneficial relationship for both organisms involved.