Which Indigenous people, closely associated with the former Inca cultural sphere and Quechua languages, are known for Andean terrace agriculture?

Fact

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The Quechuas, one of the most significant indigenous peoples of South America, primarily live in the high Andes of Peru, Bolivia, Ecuador, and Colombia. Heirs to the Inca Empire, they have perfected the technique of agricultural terracing to cultivate plants in challenging mountain environments, a practice that continues to impress modern engineers and agronomists. This method not only maximizes arable space in mountainous regions but also helps prevent erosion and manage water effectively. The Quechuas also retain extensive knowledge of medicinal plants and traditional crops, playing a crucial role in preserving biodiversity and ancient ecological knowledge.