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GS Geography Physical Geography of World
Q.

Mounds of sand formed by wind action are called:
Explanation:

ANS. (C) 
Cliff is a high and extremely steep rock face that approaches the vertical, either inland or along a coastline. Cirque refers to a deep rounded hollow having steep sides, formed through erosion by snow and ice. Dune is a hill or ridge of sand accumulated and sorted by wind action.

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