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Which outcome occurs when increased atmospheric carbon dioxide enhances calcium carbonate dissolution in oceans?

A)Decreased marine organism shell formation
B)Increased coastal mangrove forest stability
C)Enhanced thermohaline circulation downwelling
D)Expanded deep-sea hydrothermal vent activity

💡 Explanation

Decreased shell formation happens because elevated CO2 levels drive ocean acidification via carbonic acid formation, thus increasing carbonate dissolution. This reduces the availability of calcium carbonate for shell formation in marine organisms, therefore hindering their ability to build and maintain shells, rather than stabilizing mangroves.

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