Acid rain contributes to soil erosion. acid rain can be caused by

Sulfur dioxide and nitrogen oxides dissolve very easily in water and can be carried very far by the wind. As a result, the two compounds can travel long distances where they become part of the rain, sleet, snow, and fog that we experience on certain days. ... These pollutants cause acid rain.

acid rain can be caused by Air polution and the degraded ozone layer.

i would go with b

cytokinesis occurs after telophase so that eliminates d

and the entire reason for cytokinesis is for cellular reproduction