Final answer:
Drought was a key factor in the downfall of the Inca civilization due to its impact on agriculture and food production.
Explanation:
Drought was a possible factor in the downfall of the Inca civilization. Environmental factors such as drought can have significant impacts on societies reliant on agriculture like the Inca Empire. The availability of water for irrigation and efficient crops, such as potatoes and maize, were crucial for their food production and sustainability.
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