are large, pyramidal hills of sand built from a moderate sand supply when winds blow regularly from several different directions.
A
Coastal Dunes
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B
Barchans
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C
Star Dunes
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Solution
The correct option is C Star Dunes It's believed that 8.5 percent of sand dunes are of the star variety.When winds blow frequently from various directions, they form enormous, pyramidal sand hills from a moderate sand supply.