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← GeographyWhich outcome results when increased wave refraction focuses energy onto pre-existing coastal sea stacks composed of weaker sedimentary rock?
A)Accelerated base erosion via hydraulic action✓
B)Formation of a tombolo structure
C)Increased biogenic accretion rate
D)Enhanced clathrate destabilization nearby
💡 Explanation
Increased wave refraction concentrates wave energy, causing accelerated erosion at the stack's base via hydraulic action; because hydraulic action weakens the structure, therefore the stack will eventually collapse rather than form a tombolo or experience biogenic accretion under these conditions.
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