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A boy sets up a picnic on the beach next to a sand dune. how are sand dunes formed?

Answer :

CLEOTHEBATHROOMSFREEIN

Answer:

Sand dunes are created when wind deposits sand on top of each other until a small mound starts to form. Once that first mound forms, sand piles up on the windward side more and more until the edge of the dune collapses under its own weight.

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