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← Nature & AnimalsWhich risk significantly increases for coral when excess nutrients disrupt the symbiosis?
A)Increased susceptibility to coral bleaching✓
B)Elevated reproductive output by polyps
C)Enhanced structural integrity of skeleton
D)Optimal zooxanthellae photosynthetic efficiency
💡 Explanation
Coral bleaching increases because *nutrient pollution* causes *zooxanthellae expulsion*; thus triggering the *cellular respiration mechanism* impacting coral metabolism. Therefore, lacking energy production risks bleaching, rather than benefiting from efficient photosynthesis because eutrophication alters thermal tolerance.
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