Final answer:
The Andes Mountains had the largest impact on the development of Inca civilization. They influenced the Inca's road system, defense strategies, and agricultural practices.
Step-by-step explanation:
The Andes Mountains had the largest impact on the development of Inca civilization. The Inca Empire was located in the Andes Mountains of South America, and the mountainous terrain shaped their culture and society in several ways.
The Inca built an extensive road system to navigate the steep slopes and connect their empire. These roads enabled the rapid movement of their highly trained army and facilitated communication through a relay system. Additionally, the Inca used the mountains for defense, establishing citadels and fortresses in strategic locations.
Furthermore, the Andes Mountains provided the Inca with valuable resources such as minerals, fertile soil for agriculture, and water sources. They developed terraced farming techniques to make use of the mountainous terrain and maximize agricultural output.