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Geography

Which 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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