Description : Mounds of sand formed by wind action are called (1) Cliffs (2) Cirques (3) Dunes (4) Hamadas
Last Answer : (3) 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 ... by snow and ice. Dune is a hill or ridge of sand accumulated and sorted by wind action.