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← GeographyWhich outcome diminishes dune migration rate when vegetation emerges?
A)Decreased formative surface creep✓
B)Increased atmospheric sand supply
C)Enhanced abrasive particle dislodgement
D)Amplified thermal gradient instability
💡 Explanation
A decrease in formative surface creep diminishes dune migration rate because the vegetation physically restricts sand grain movement at the dune surface, preventing transport. Therefore, the dunes migrate more slowly rather than more quickly, because less sand supply would slow this.
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