The climate on the leeward side of a mountain differs from that on the windward side mostly in
a. the strength of the winds.
b. the direction of the winds.
c. the angle of sunlight.
d. the amount of rainfall
The climate on the leeward side of a mountain differs from that on the windward side mostly in "a. the strength of the winds", since the leeward size of an object means that the object is blocking the oncoming winds.