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Which outcome is triggered when coastal upwelling weakens seasonally?

A)Harmful algal bloom proliferation intensifies
B)Deep-ocean nutrient supply replenishment increases
C)Stratospheric ozone thinning rate accelerates
D)Submarine methane hydrate destabilization decreases

💡 Explanation

Algal blooms intensify because decreased upwelling reduces nutrient competition, therefore they dominate the plankton ecosystem, rather than ozone depletion, because upwelling primarily involves ocean chemistry interactions.

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