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Which risk increases when seasonal ground freeze impacts water delivery beneath Mughal gardens embedding 'pietra dura'?

A)Piping shifts disrupt inlay alignment
B)Algae growth accelerates stone decay
C)Water erosion degrades mortar sealants
D)Biofilms stain surfaces unevenly

💡 Explanation

A combination effect occurs because Ice lens formation causes soil expansion beneath the 'pietra dura' installations employing freeze-thaw action leading to subsurface disruption; therefore tiled artwork shifts rather than sustaining uniform frost heave, as continuous slabs might.

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