Which part of a sand dune typically slopes at the angle of repose of sand?

Name: Which part of a sand dune typically slopes at the angle of repose of sand?
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The leeward side of a sand dune is typically the side that slopes at the angle of repose of sand. This is because it is sheltered from wind and sand movement, allowing the sand to settle at its natural angle of stability. The windward side, on the other hand, is typically steeper due to the constant wind pushing sand up the slope.

Which Part of a Sand Dune Typically Slopes at the Angle