Answer:
North
Step-by-step explanation:
The North of the Atlas Mountains receive much more precipitations than the South.
The Atlas mountains are located in Northern part of Africa. The humidity comes from the Atlantic and the Mediterranean sea and is blocked by the high mountains (reaching over 13,000 feet).. so the rain has to fall on the North side of the mountains.
The South side is mostly dry and receive very little precipitation because it's blocked by the mountains.