Which risk increased around Mesopotamian ziggurats when seasonal river clay was mismanaged?

💡 Explanation

Differential subsidence increased because seasonal flooding softened the clay foundations unevenly; the differential compaction introduces stress concentration, therefore localized sinking occurs as the structure deforms, rather than supporting loading uniformly.

• During rainfall, which risk was reduced in Mesopotamian ziggurats via bitumen application above sun-dried bricks?
• During 18th-century celestial navigation, which outcome occurred because thermal expansion affects metal sextant components?
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• Which error arises when an Inca quipu for annual maize yield tallies are misinterpreted?