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← GeographyWhich change accelerates cave roof collapse via dissolution?
A)Decreased groundwater carbonic acid levels
B)Increased overlying sediment hydraulic pressure✓
C)Elevated cave atmospheric methane abundance
D)Reduced drip rate calcite precipitation
💡 Explanation
Consolidated sediment increases hydraulic pressure on the cave roof, enhancing bedrock stress corrosion cracking; because hydraulic pressure causes accelerated dissolution, collapse accelerates; therefore, increasing pressure creates more rapid cave-in, rather than chemical changes or less frequent calcification.
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