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← GeographyWhich process increases cave formation permeability when precipitation increases?
A)Carbonation enhanced by increased soil CO2✓
B)Oxidation of iron minerals in rocks
C)Physical weathering from freeze-thaw cycles
D)Crystallization of evaporite minerals like gypsum
💡 Explanation
Higher precipitation increases soil CO2 levels because of increased biological activity; this drives carbonation, increasing dissolution of limestone, promoting cave formation. Enhanced carbonation, therefore, dissolves the rock faster than oxidation or physical weathering.
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