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← GeographyWhich outcome occurs when floodplains experience prolonged anaerobic conditions?
A)Increased organic matter accumulation.✓
B)Reduced pedogenesis by plant roots.
C)Accelerated leaching of mineral salts.
D)Increased oxidation of ferrous compounds.
💡 Explanation
Increased organic matter accumulation results because anaerobic conditions inhibit decomposition leading to higher organic matter; this slows the pedogenesis mechanism. Organic matter thus accumulates, therefore the correct answer is A, rather than options involving mineral transport under oxidized, aerated conditions.
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