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← GeographyWhich outcome occurs when a cave's ventilation decreases?
A)Reduced stalactite growth rate✓
B)Increased microbial speleothem decay
C)Enhanced condensation corrosion within cave
D)Elevated radon gas accumulation risk
💡 Explanation
A decrease in cave ventilation reduces CO₂ outgassing, causing less calcium carbonate precipitation via the dissolution equilibium known as mineral precipitation. This slows stalactite growth because CaCO₃ remains in solution, rather than depositing; therefore rate decreases, rather than increasing speleothem decay.
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