Which risk increases closest to the surface when significant rainwater infiltration causes cave roof thinning?

💡 Explanation

Roof thinning increases the risk of a sinkhole because subsidence occurs as rainwater dissolves supporting limestone via chemical weathering, therefore collapse increases surface load requirements, rather than increased gas risks deeper down.

• Which outcome occurs when fine loess sediment subsides?
• Which environmental outcome occurs when dust deflation impacts soil?
• Which effect typically occurs in coastal Peruvian fisheries during prolonged El Niño events?
• Which hydrologic consequence results from El Niño events?
• Which outcome occurs when sediment delivery decreases to barrier islands?
• Which risk acutely increases after pyroclastic density current deposition?