Which physical degradation increases along pietra dura inlay lines in Mughal-era structures exposed to cyclical humidity?

💡 Explanation

Differential thermal expansion degrades pietra dura because different materials expand/contract at different rates during temperature, humidity, and seasonal changes in the building. This results in cracking along the interfaces, therefore ‘A’ rather than corrosion which involves dissimilar metals or sublimation occurring with phase transitions.

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