Which outcome occurs when a sea stack’s foundation undergoes prolonged undercutting?

💡 Explanation

Mechanical breakup intensifies as undercutting concentrates wave energy on the stack base, causing instability. This process, termed basal sapping, weakens the structure, eventually leading to collapse because the structural integrity is compromised; therefore stack reduces from increased weathering, rather than deposition.

• Which outcome results from increased weathering in fjords?
• Which risk increases in a caldera following resurgent dome formation?
• Which climate effect results when the Intertropical Convergence Zone (ITCZ) annual oscillation is restricted to a narrow latitudinal band?
• Which effect primarily shapes soil structure due to intensive earthworm activity?
• Which process determines shape when freeze-thaw weakens bedrock walls above a glacial cirque?
• Which process amplifies ground shaking during earthquakes in areas with thick unconsolidated sediments?