In the context of the mangrove passage, what prevents sequestered carbon from rapidly returning to the atmosphere?
Answer and explanation
Correct answer: C. The oxygen-depleted (anoxic) condition of the trapped marine sediment layers
- Step 1: The passage specifies that sediments are trapped in 'oxygen-depleted marine soils, preventing carbon from oxidizing back into the atmosphere'.
- Step 2: Lack of oxygen (anoxia) suppresses microbial aerobic respiration and oxidative breakdown.
Answer
The oxygen-depleted (anoxic) condition of the trapped marine sediment layers.
Why not the others: 'Active biological incineration...' is nonsensical and contrary to preservation; 'The presence of highly alkaline chemical runoff...' is unsupported; 'Solar photolysis occurring beneath dense forest leaf canopies' contradicts the light-blocking nature of forest canopies.
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