Which of the following marine habitats is considered one of the most productive, yet is threatened by coastal development and ocean acidification?

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A Deep Ocean Trenches
B Open Ocean
C Coral Reefs and Mangroves
D Polar Ice

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Answer: C. Coral Reefs and Mangroves

Answer: C. Coral Reefs and Mangroves
Explanation: Coastal and shallow-waters contain some of the world's most diverse ecosystems (coral reefs, mangroves), which protect coastlines and support huge biodiversity.

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Which of the following marine habitats is considered one of the most productive, yet is threatened by coastal development and ocean acidification?

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