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← GeographyWhich outcome occurs when wave diffraction focuses energy on coastal headlands exhibiting fractured stacks?
A)Increased hydraulic weathering widens fractures✓
B)Decreased sediment transport onshore increases
C)Reduced groundwater salinity stabilizes stacks
D)Enhanced biogenic cementation strengthens lithification
💡 Explanation
Increased hydraulic weathering occurs because pressure fluctuations exploit weaknesses at small features of fractured stacks. Wave diffraction concentrates power, thus promoting crack propagation by the hydraulic action, rather than consolidation from sediment increase or biological processes, as wave force is primary.
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