They are created by the winds that originate from different directions. The higher ones might be affected by one wind current while lower ones may be affected in other ways.
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The force of winds shapes sand dunes.
"In physical geography, a dune is a hill of loose sand built by aeolian processes (wind) or the flow of water.[1] Dunes occur in different shapes and sizes, formed by interaction with the flow of air or water"-Wikipedia
Fore dunes and back dunes but mostly fore dunes.
They are created by the winds that originate from different directions. The higher ones might be affected by one wind current while lower ones may be affected in other ways.
The whole beach or whatever it was on would be totally flat. Wind is what shapes sand dunes. Without it, they just would not exist.
Sand dunes have a million shapes and even change as you look at them.
They were both formed by wind erosion.
Both form weather dune is has sand delta water
Your question is not a question. It is a statement. Please clarify what you want to know.
Desert dunes typically form in arid regions and are characterized by their sandy composition and unique shapes sculpted by wind. Beach dunes, on the other hand, are found along coastlines and are made up of sand deposits from the beach. Both types of dunes play important roles in stabilizing ecosystems and protecting land from erosion.
Barchan dunes are solitary crescent dunes formed on a flat, hard ground with limited supplies of sand and vegetation. Transverse dunes are a series of long ridges that are found in areas that have a lot of sand but sparse vegetation.