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← GeographyWhich outcome occurs when deflation winnowing in dunes weakens?
A)Smaller ripples migrate downwind
B)Parabolic dune formation increases✓
C)Barchan dunes become more stable
D)Seif dune linearity is disrupted
💡 Explanation
Increased soil moisture enables dune vegetation stabilizing mobile sand sheets; this activates parabolic dune formation because vegetation anchors dune horns rather than slipface retreat, therefore parabolic shapes occur rather than barchan or seif forms.
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