In the Florida Everglades oysters can be found growing on the roots of mangrove trees, as shown in the fustrations. The oysters are protected from predators as they grow on the underwater roots. The oysters do not harm the trees, nor do they provide any benefit to the trees. Which of the following relationships is most similar to the relationship between the mangrove trees and the oysters?

A. African ants living in acacia trees feed on leaf-eating insects found on the tree.
B. Spider crabs are camouflaged by the green-brown algae living on their shells.
C. A whale is unaffected by the attached remora fish feeding on the whale's leftover food.
D. Bees fly from one flowering plant to another gathering nectar and pollinating the flowers.