A Hummingbird That Pollinates Morning Glory Flowers and Nests in the Crotch

Multiple Choice

A hummingbird that pollinates morning glory flowers and nests in the crotch of an apple tree.The apple tree is not harmed or helped by the hummingbird.The relationship between the hummingbird and the apple tree is a

A) mutualism.
B) commensalism.
C) competition.
D) parasitism.
E) predation.