Question

What are "Sand Dunes " ?
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class 7th "An Alien Hand" Lesson 3 .)​

Answer 1

Answer:

Sand dune, any accumulation of sand grains shaped into a mound or ridge by the wind under the influence of gravity. Sand dunes are comparable to other forms that appear when a fluid moves over a loose bed, such as subaqueous “dunes” on the beds of rivers and tidal estuaries and sand waves on the continental shelves beneath shallow seas.

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Answer 2

Answer:

A Sand dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex.

Explanation:

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