Which risk increases when wind loads act perpendicular to the flat faces of Inca terraced walls?

💡 Explanation

Increased surface exposure accelerates mortar detachment via spalling, causing increased masonry erosion, because wind-driven rain enhances cyclical wetting and drying stresses. Therefore, material loss increases due to cycles, rather than cracking intrinsic rock, quipu decay, or animal grazing effects alone.

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