Which limiting factor constrained widespread adoption of terrace farming by pre-Columbian Andean civilizations despite its erosion-reducing properties?

💡 Explanation

Extensive terracing required significant modification of hillsides, demanding intensive and coordinated communal labor efforts for construction and maintenance, because Andean societies depended on large-scale collective work known as 'mita'. Therefore communal labor needs constrained adoption, rather than inferior tools, disease, or draft animals, which were less relevant limitations in this context.

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• Which outcome frequently resulted when ancient Andean terrace farms cultivating maize experienced prolonged drought conditions?
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