Final answer:
The Aztec and Inca empires adapted their natural environments by using terrace farming, irrigation systems, aqueducts, and canals to maximize agricultural output and control soil fertility. So, the option a is correct.
Step-by-step explanation:
The Aztec and Inca civilizations ingeniously molded their natural surroundings to enhance agricultural productivity through adept adaptations like terrace farming and sophisticated irrigation systems.
In Lake Texcoco, the Aztecs implemented chinampas, elevated planting-beds on floating platforms, optimizing land use.
Meanwhile, the Incas employed terraces strategically etched into mountain contours, crafting level, and cultivable expanses.
Both societies harnessed aqueducts, canals, and soil enhancement techniques to guarantee effective irrigation and sustain soil fertility.
By integrating these innovative agricultural practices, the Aztecs and Incas demonstrated resourcefulness in manipulating their environments, utilizing geography to their advantage and establishing sustainable methods that significantly contributed to the prosperity of their empires.
The combination of terrace farming and advanced irrigation underscored their profound understanding of agriculture, marking a pivotal aspect of their cultural and technological achievements.
Therefore, the option a is correct, using terrace farming and irrigation systems to maximize agricultural output.