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← GeographyWhich horizon change accelerates with increased freeze-thaw cycles?
A)Increased physical weathering of parent material✓
B)Decreased levels of organic accumulation
C)Enhanced chemical transport via leaching
D)Elevated rates of bioturbation mixing
💡 Explanation
Freeze-thaw cycles accelerate physical weathering because ice expansion causes fracturing of rocks (frost wedging), therefore the A horizon material breakdown dominates, rather than accumulation, leaching, or mixing from biological activity.
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