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← GeographyWhich soil structure benefits most from earthworm bioturbation?
A)Compacted clay subsoil horizons✓
B)Rapidly leaching sandy topsoil
C)Volcanic ash-rich Andisols
D)Highly saline coastal marsh soils
💡 Explanation
Compacted clay benefits from bioturbation because it generates soil macropores that increase aeration and water infiltration via soil organism activity, therefore improving drainage. This helps more than sandy soil, rather than rapid leaching alone.
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