Answer:
The answer would be A, to lead sperm cells to the ovary. Hope this helps you out!
Every organism has a unique ecosystem within which it lives. This ecosystem is its natural habitat. This is where the basic needs of the organism to survive are met: food, water, shelter from the weather and place to breed its young. All organisms need to adapt to their habitat to be able to survive.
Cell - neuron, egg, bacteria, perenchyma
tissue - bone
organ - leaf, flower, eye
organ system - blood, human skeleton
organism - mushroom, bear
not 100% sure but tried