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Generate QuizWhich of the following is a major threat to coral reefs globally?
- Increased ocean alkalinity
- Coral bleaching due to rising sea temperatures
- Decreased salinity
- Overfishing of herbivorous fish only
Answer: Coral bleaching due to rising sea temperatures
Warmer waters cause corals to expel symbiotic algae (zooxanthellae), leading to bleaching, reduced growth, and potential mortality.