Which risk increases when prolonged undermining erodes a castle's foundation during a siege operations?

💡 Explanation

When prolonged undermining erodes a castle's foundations, instability increases because subsurface material properties are weakened leading to a catastrophic shear failure. Therefore, global infrastructure weakness causes complete collapses, rather than localized cracks from hydrostatic forces, tactical vulnerabilities, or weaknesses from thermal expansion.

• Which optical characteristic would MOST limit the performance of early medieval Islamic astrolabes used for astronomical observations?
• Which constraint primarily limited the yield of maize crops grown in Aztec chinampas?
• Which primary destabilizing outcome arose from the repeated irrigation salinization in ancient Mesopotamian canals?
• Which mechanical outcome accelerated the decline of Roman aqueducts after the 5th century AD?
• Which risk increased when iron became widely used in Roman siege engine construction, compared to bronze?
• Which outcome resulted from intensive maize cultivation in the pre-Columbian Americas using slash-and-burn techniques?