Which landform develops through dissolution accelerating weathering by freeze-thaw?

💡 Explanation

Expansion of karst sinkholes results from acidic water dissolving limestone, because freeze-thaw widens cracks enhancing dissolution. This accelerates the process, therefore sinkholes expand, rather than the other options that involve different mechanisms like erosion or volcanic activity.

• Which outcome results when concentrated atmospheric carbonic acid undergoes heightened dissolution of karst bedrock?
• Which ocean current change results when subtropical gyre intensification weakens atmospheric Hadley cell return flow?
• Which outcome arises when weakened trade winds reduce upwelling off South America during an El Niño event?
• Which outcome occurs when floodplains lack riparian vegetation?
• Which outcome occurs when prolonged drought weakens aquifers?
• Which mechanism causes a meandering stream to erode one bank while depositing sediment on the opposite bank?