Q.

Mounds of sand formed by wind action are called

A. Cliffs
B. Cirques
C. Dunes
D. Hamadas
Answer» C. Dunes
Explanation: 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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