Question

1.
What are sand dunes? How do they shift from one part of deserts to
another?​

Answer 1

Answer:

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Explanation:

Answer 2

Answer:

A dune is a landform, and is a large mass of wind-blown sand. Dunes are most common in deserted environments, such as the Sahara, and also near beaches. An area with dunes is called a dune system. In physical geography, a dune is a hill of loose sand built by aeolian processes or the flow of water.

Explanation:

They can move through a mechanism known as “saltation”, where the particles of sand are removed from the surface and are carried by the wind, before landing back to the surface. When these particles land, they can scatter other particles and cause them to move as well.