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Which risk increases for intricate pietra dura inlays when subjected to repeated, intense thermal cycling within Mughal-era buildings?

A)Differential thermal expansion stresses at interfaces
B)Staining from airborne particulate accumulation
C)Biogenic weathering on exposed surfaces
D)Solvent-induced salt precipitation along grain boundaries

💡 Explanation

Increased risk of differential thermal expansion arises, because varying expansion rates among the inlaid stones and marble matrix induce shear stress at the boundaries. This thermo-mechanical fatigue weakens the fragile bond; therefore, cracking and loosening becomes likely, rather than surface staining which develops over longer timescales.

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