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Geography

Which risk increases when heavy rainfall saturates epikarst?

A)Sudden sinkhole collapse
B)Increased surface albedo
C)Decreased soil pH
D)Enhanced carbon sequestration

💡 Explanation

Heavy rainfall saturates the epikarst, increasing pore pressure. This reduces effective stress, triggering **mechanical weathering** leading to sinkhole collapse because the soil's cohesive strength is exceeded, therefore sudden collapse rather than gradual subsidence occurs.

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