Question

what are sanddunes?​

Answer 1

Answer:

sand dune is a mount, hill or ridge of sand that lies behind the part of the beach affected by tides. They are formed over many years when windblown sand is trapped by beach grass or other stationary objects. ... Without vegetation, wind and waves regularly change the form and location of dunes.

Explanation:

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Answer 2

Answer:

sand dunes are low hill like structure which is formed by collection of sand