Answer:
Rain shadow
Step-by-step explanation:
Climate is the average weather condition of a place over a long period of time. 
The image shows a rain shadow effect around a mountainous region. The type of rainfall controlled this way is known as an orographic rainfall. 
- On the leeward side which is the opposite side of where the rain cloud forms, there is dryness and lack of rainfall. 
 - As moist air rises along the edge of the windward side, cloud forms. 
 - This windward side receives a significant amount of rainfall 
 - The windward side is hit with cold and dry wind and it is barren.