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← GeographyWhich risk increases when topsoil bioturbation exceeds threshold rates?
A)Accelerated chemical weathering rates✓
B)Increased water holding capacity
C)Enhanced aggregate stabilisation
D)Greater soil horizon differentiation
💡 Explanation
Nutrients cycle faster due to increased oxygen exposure; therefore, chemical weathering accelerates because burrowing promotes surface contact rather than increased soil stability due to aggregate disturbance and mixing during bioturbation.
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