Which effect results when ancient Andean terrace retaining walls experience increased hydrostatic pressure from saturated soil?

💡 Explanation

When walls experience hydrostatic pressure, pore water pressure accumulates and reduces effective stress, initiating soil failure along a continuous rupture surface creating terrace slippage. Therefore, terrace slippage results, rather than crop failure, albedo increase, or reduced evapotranspiration which require different physical causes.

• Which stability risk increases when the clay bricks of a ziggurat experience prolonged ground saturation?
• Which optical effect allowed Alhazen to more accurately model human vision and astronomy?
• Which metallurgical change improved iron weapons over bronze ones in the late Bronze Age?
• Which mechanism enabled Ibn al-Haytham's (Alhazen) accurate descriptions of image formation via pinhole?
• Which risk increased in 18th-century sailing ships when longer voyages exceeded timber's rot resistance?
• Which agricultural disadvantage becomes limiting on pre-Columbian steep terrace farms in the Andes after sustained rainfall?