Which risk sharply increases for Arctic infrastructure as solifluction exceeds design thresholds?

💡 Explanation

Subsidence risk rises because increased soil saturation and loss of shear strength from exceeding solifluction thresholds leads to thaw consolidation. Infrastructure settles because permafrost weakens, therefore A is correct rather than increased seismic activity from soil changes.

• Which outcome occurs when heavy pyroclastic flows enter lakes?
• Which outcome happens when rapid alluvial deposition occurs?
• Overpressure risk increases within volcanic conduit containing pyroclastic material due to what?
• Which outcome commonly occurs to terminal lakes in endorheic basins due to high evaporation?
• Which mechanism causes the formation of a volcanic arc during oceanic plate subduction?
• Which consequence results when increased sediment load overwhelms channel capacity in a proglacial stream?