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← GeographyWhat key effect can accelerate sea stack collapse due to basal undercutting?
A)Wave focusing and abrasion.✓
B)Glacial isostatic rebound rates.
C)Biogenic reef structural weakening.
D)Halocline stratification and upwelling.
💡 Explanation
Wave focusing results in increased erosion because wave energy concentrates at the base of the stack from wave refraction, increasing abrasion; therefore, undercutting accelerates collapse, rather than uniform erosion or other irrelevant factors.
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