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← GeographyOffshore aquaculture within a fjord accelerates which geological process?
A)Anoxic sediment layer upwelling✓
B)Reduced sediment accumulation rate
C)Accelerated isostatic land rebound
D)Permafrost thaw destabilization
💡 Explanation
Eutrophication from aquaculture increases organic matter deposited on the fjord floor, leading to increased microbial respiration and oxygen consumption, creating anoxic conditions that stimulate sediment *upwelling*; therefore choice A, rather than reduced sedimentation because processes facilitate gas release.
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