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← GeographyWhich outcome occurs when groundwater becomes highly acidic in karst regions due to agricultural fertilizer runoff?
A)Accelerated sinkhole formation✓
B)Increased sediment deposition
C)Enhanced cave system stability
D)Reduced groundwater flow velocity
💡 Explanation
Accelerated sinkhole formation occurs because agricultural runoff acidifies groundwater, increasing carbonic acid concentrations and dissolving limestone via the process of chemical weathering, thus expanding fractures more rapidly; therefore, subsidence accelerates with acidic water rather than slower rates without those compounds.
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