Within the Middle East and North Africa region, what percentage experiences average annual rainfall of less than 100 mm?

• A. 15%
• B. 5%
• C. 25%
• D. 65%

Answer: (D)

Very low rainfall is a defining feature of this region. The Middle East and North Africa are dominated by deserts and arid zones, where rain is scarce and highly uneven, occurring mostly in a few elevated or coastal areas. Because of that, a large portion of the area experiences less than 100 mm of rain each year—and about two-thirds of the region falls into this hyper-arid category. That aligns with roughly 65%, making it the best choice. The smaller percentages would imply much more of the region gets more rainfall than is typical, which doesn’t match the widespread desert climate.