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← GeographyWhich outcome occurs when longshore drift is interrupted by a groin?
A)Erosion increases down-drift of groin✓
B)Sediment accumulates equally both sides
C)Wave refraction decreases significantly overall
D)Beach nourishment becomes naturally uniform
💡 Explanation
Erosion increases down-drift of the groin because sediment transport is reduced through sediment starvation downstream; therefore, erosion increases on the down-drift side, rather than accumulating sediment evenly without impediment.
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