Permanent streams in desert regions are rare,and when they do occur,________.
A)they originate in a glacier region
B)they have numerous tributaries to keep them supplied with water as they cross the desert
C)they originate outside of the desert region and have few tributaries in the desert
D)they get their water from wadis and arroyos

Question

Quizplus · Accepted Answer

Permanent streams in desert regions are usually supplied by sources outside the desert region, such as mountain ranges, and have fewer tributaries within the desert itself. This is because desert regions generally receive very little rainfall, and any water that does fall will quickly evaporate or be absorbed by the dry soil, rather than flowing into a stream.

Permanent Streams in Desert Regions Are Rare,and When They Do