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← GeographyWhich outcome contributes to sea stack formation when waves erode coastal cliffs?
A)Hydraulic action fractures weakened rock✓
B)Thermal expansion reduces rock stability
C)Chemical weathering dissolves minerals fast
D)Isostatic rebound elevates land slowly
💡 Explanation
Hydraulic action causes rapid joint fracture because pressurized water enters rock crevices, weakening them faster than weathering processes; therefore, stacks form detached, rather than landscape uplift causing gradual elevation, or purely chemical/thermal weakening.
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