Which constraint limited the scale when constructing ziggurats with mud bricks reinforced by bronze anchors?

💡 Explanation

Acquiring sufficient copper and tin resources was a major limiting factor on ziggurat construction, because bronze anchors provided reinforcement but relied on geographically constrained ore deposits. Therefore resource scarcity became a constraint, rather than the alloy tensile strength, thermal expansion, or mud-brick erosion rates that would have been secondary concerns given sufficient resources.

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