A loose pile of wind-blown sand.
A sand dune
the top of a sand dune is called the crest of the dune.
A hill of sand in a desert is normally referred to as a dune
A sand dune is a landform, not a climate.
A sand dune is a pile of wind-blown sand.
A sand dune is the deposition of windblown sand.
A sand dune that got blown away
A sand dune is a Constructive force.
A Sand Dune, more specifically a "Seif Dune" or a "Barchan Dune".
A sand dune is a very large accumulation of loose sand, often forming "wave" shapes. High winds carry sand for long distances and pile it up. (A similar process occurs with blowing snow that forms drifts in blizzards.)
small hill of sand caused by the action of wind
It is a sand dune that is formed at right-angle to the prevailing wind.