Question

what are sand dune ? ​

Answer 1

Answer:

A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate. Every dune has a windward side and a slipface.

Answer 2

Answer:

a dune is a mound of sand formed by wind, usually along the beach or deserts