What is the group that distinguishes aldehydes from most other classes of compounds?

a warm, wet climate will produce the highest rate of weathering. the warmer a climate is, the more types of vegetation it will have and the greater the rate of biological weathering (figure below). this happens because plants and bacteria grow and multiply faster in warmer temperatures.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.