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← GeographyWhich crustal response results from the ongoing subduction along megathrust boundaries?
A)Forearc basin sediment accumulation increase✓
B)Decreased volcanic arc eruption frequency
C)Rift valley expansion acceleration inland
D)Continental shield landmass stabilization initiation
💡 Explanation
Forearc basins accumulate sediment because the subducting plate scrapes material off the overriding plate in a process called accretionary wedge formation; therefore, sedimentation substantially expands there, rather than reducing volcanism via melt reduction.
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