Water damage risks rise notably when subsurface Mughal garden runoff erodes the mortar beneath 'pietra dura' inlay panels, permitting what mechanism?

💡 Explanation

Capillary action draws water between the inlay and the substrate because subsurface erosion creates pathways. Moisture accumulates rather than draining, therefore increasing the risk of further decay due to repeated wetting-drying cycles. Stress fractures require pre-existing surface cracks.

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