Which constraint most limited the construction of steep agricultural terraces by the Inca civilization?

💡 Explanation

When building steep terraces, a robust binding agent is crucial to stabilize the retaining walls because the high soil pressures acting on steep slopes can easily cause the structure to fail. Therefore, the limited availability of suitable binding agents constrained building very steep terraces, rather than lack of tools, drainage, or understanding of soil nutrients, these were managed effectively.

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