Acacia Trees Often Have Ants That Live on Them

Multiple Choice

Acacia trees often have ants that live on them. The ants feed on materials produced by special structures called nectaries, which the tree produces. The ants will attack other animals that begin to feed on the tree and will even cut off small branches of other trees that come in contact with "their" tree. The relationship between Acacia trees and ants is called

A) mutualism.
B) competition.
C) predator/prey.
D) parasite/host.