The correct answers are:
- the right side of the mountain is the windward side;
- the left side of the mountain is the leeward side;
The windward side of the mountain is the side facing the see. This side acts like a natural barrier for the warm and moist air masses, so they condensate and this side receives a lot of precipitation. That makes the windward side have much more vegetation.
The leeward side is the side of the mountain that is on the opposite side of the sea. This side is receiving very little precipitation, and usually it only gets downward dry winds. That makes this side of the mountain much drier and having much less vegetation.