Which environmental change most negatively impacted ancient Andean terrace farming stability?

💡 Explanation

With drought, soil moisture declines, which causes soil cohesion to decrease due to reduced capillary action, accelerating terrace erosion and collapse. Therefore drought is directly relevant, rather than seismicity, radiation, or plant invasions which are influenced more by different soil properties and climate factors.

• Which mechanical effect necessitated the design of staggered or offset gatehouses in Roman fortifications?
• Which mechanical consequence resulted from accelerated wood fiber relaxation in 18th-century ship construction?
• Which vulnerability increased in Roman castra when fortifications relied heavily on a single gate design?
• Which mechanism initially constrained the operational altitude of early hot air balloons?
• Which mechanism most contributed to shot consistency in 15th-century trebuchets during sieges?
• Which mechanism allowed medieval masons to construct taller Gothic cathedral walls with large windows?