I need help for #6 on my quiz,

A cuckoo lays its eggs in a warbler's nest. The cuckoo's young will push out the warbler's young.

A) Commensalism
B) mutalism
C)parasitism

Plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.