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Crescent-shaped dunes with wings pointing downwind are called:

ASeif dunes
BParabolic
CTransverse
DBarchans
Answer & Solution
Correct answer: D. Barchans
1. They form under constant moderate wind. 2. Crescent dunes are barchans. 3. A seif has only one wing. _Source: syllabus Fundamentals of Physical Geography, Chapter 7, Landforms and their Evolution._
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