Which risk increases drastically due to prolonged tephra fallout near active stratovolcanoes?

A)Abrasive wear in hydroelectric turbine blades✓

B)Compromised bridge structural integrity from corrosion

C)Reduced photosynthetic efficiency in alpine forests

D)Increased sediment deposition in coastal estuaries

💡 Explanation

Abrasive wear risks intensify during tephra fallout because fine volcanic ash erodes turbine surfaces via abrasion, rather than other corrosive effects, therefore, requiring costly repairs; rather than forest shading/sedimentary/structural issues.

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Which risk increases drastically due to prolonged tephra fallout near active stratovolcanoes?

💡 Explanation

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