Answer :
Final answer:
The Aztecs and the Incas fell due to the arrival of Spanish conquistadors.
Explanation:
The Aztecs and the Incas both fell due to the arrival of Spanish conquistadors. The Spanish conquistadors, led by Hernán Cortés and Francisco Pizarro, encountered the empires during their expansion of the Spanish empire in the 16th century. The advanced weaponry, diseases, and alliances formed by the Spanish ultimately led to the downfall of these indigenous civilizations.
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