Question

What are sand dunes? How they are formed

Answer 1

Answer:

this is your answer bro

Explanation:

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Answer 2

A dune is a hill of loose sand built by aeolian processes (wind) or the flow of water. Dunes occur in different shapes and sizes, formed by interaction with the flow of air or water. Dunes occur in some deserts and along some coasts.

Sand dunes are created around obstacles on the beach, these could be natural such as a rock or human things such as some waste drift wood or a fence. The sea brings sediment to the beach and then the wind redistributes that sediment. When the wind encounters the beach obstacles velocity falls and sediment is DEPOSITED.

this is how sand dunes are formed

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