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← GeographyWhich risk increases as a coastal lahar increases momentum?
A)Hydraulic plucking of downstream terraces✓
B)Isostatic rebound of coastline
C)Increased suspended sediment flocculation
D)Sea ice edge albedo reduction
💡 Explanation
Hydraulic plucking increases with lahar momentum because increased force overcomes the substrate's shear strength, triggering debris entrainment. Therefore, terrace erosion increases rather than sediment settling because high flows encourage greater competence.
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