Which vulnerability results when sapping erodes a castle's foundation wall?

💡 Explanation

Sapping causes undermining-induced collapse of the foundational wall because removal of support concentrates stress leading to structural failure; therefore the wall fails under compression, rather than altering ballistics or water quality.

• Which outcome results when early Chinese crossbow trigger mechanisms experience excessive cyclic stress?
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• Which outcome occurred because Viking longship square sails experienced deformation at high latitudes?
• During differential thermal expansion within Mughal pietra dura inlays under sunlight exposure, which consequence gradually degrades artwork?
• Which property primarily determined wood selection for 18th-century shipbuilding hull planking?
• Which constraint arose from bronze metallurgy when creating ancient Mesopotamian socketed axes?