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Which consequence occurs when terrace construction fails along ancient Andean slopes?

A)Reduced solar irradiance exposure
B)Limited upstream irrigation access
C)Accelerated topsoil erosion occurs
D)Decreased nitrogen fixation by bacteria

💡 Explanation

Accelerated topsoil erosion results because terrace failure disrupts the soil stabilization mechanism; terracing creates level surfaces inhibiting runoff, therefore soil is rapidly lost rather than remaining productive. Reduced light, water, or nitrogen are not directly caused by slope failure.

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