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Dry area where sand dunes are found

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Detailed Solution

Desert (arid region).

Why:

Deserts are very dry, with high evaporation and little rain.
Sparse vegetation means loose sand is exposed.
Strong, steady winds pick up and deposit this sand, building dunes.

How dunes form (quick flow):

weathered rock → loose sand → wind erosion (deflation) → transport → deposition → dune.

Common dune types: barchan (crescent), transverse (wave-like ridges), longitudinal (seif), star.

Examples: Sahara and Arabian Deserts, Thar Desert (India), Namib and Kalahari.

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