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Geography

Which outcome often results when decreased wave energy surrounds isolated sea stacks?

A)Tombolo formation behind the stack
B)Accelerated stack basal undermining
C)Increased stack colonization by seabirds
D)Stack merging forming arch structures

💡 Explanation

Tombolo formation results from decreased wave energy. Reduced wave action behind the stack causes sediment deposition, and sediment accumulates because wave diffraction creates a sheltered zone, therefore tombolos form rather than direct erosion in open water conditions.

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