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← GeographyWhich mechanism causes sea stack collapse accelerated by groundwater?
A)Hydrostatic pressure-induced fracture expansion✓
B)Biogenic weathering by plant roots
C)Aeolian erosion by salt crystallization
D)Isostatic rebound following glacial melt
💡 Explanation
Hydrostatic pressure increases within cracks when saturated, advancing fracture expansion because water pressure exceeds lithostatic stress, therefore the stack weakens and collapses rather than resisting erosion through other weathering processes.
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