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← GeographyWhich risk increases when heavy tephra accumulates after eruption?
A)Structural roof collapse is more frequent✓
B)Rapid glacial retreat occurs around volcano
C)Coastal erosion accelerates unexpectedly quickly
D)Sudden change in ocean current strength
💡 Explanation
Increased roof collapse occurs because weight overcomes design limits. Tephra accumulation increases static load, which exerts vertical stress, therefore failures occur rather than enhanced erosion or ocean shifts, which are linked to different geographical influences.
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