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← GeographyWhich mechanism significantly etches and destabilizes karst topography?
A)Carbonic acid dissolution expands fractures✓
B)Glacial abrasion sculpts U-shaped valleys
C)Thermal expansion creates exfoliation domes
D)Eolian deflation amplifies desert pavement
💡 Explanation
Enhanced carbonic acid dissolution widens bedrock joints because the acidic solution chemically weathers and removes limestone. Therefore, fractures expand, rather than thermal exfoliation or glacial abrasion, because these processes lack the reactive agents needed for karst dissolution.
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