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← GeographyWhich consequence results when wave-supported abrasion weakens coastal cliffs?
A)Longshore transport system reduces sediments
B)Raised beaches build elevated land
C)Tidal bore amplitude is dampened
D)Barrier islands undergo rapid migration✓
💡 Explanation
More rapid barrier island migration occurs because wave erosion at the cliff base undermines the structure accelerating collapse and sediment loss— positive feedback. Therefore, the island quickly changes shape; rather than beach building or bore alterations, which concern sediment deposition or tidal flow rather than coastal composition.
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