Ace the California Teacher Credential Test 2026 – Elevate Your Classroom Game!

The correct answer highlights the extensive road system of the Inca civilization, which serves as a prime example of their advanced engineering skills. This network of roads was impressive not only because of its vastness—stretching over 25,000 miles—but also due to the engineering techniques employed to navigate diverse and challenging terrains, such as mountains, deserts, and forests. This road system facilitated communication, trade, and the movement of armies across the empire, demonstrating the practical applications of their engineering innovations.

In contrast, the development of the wheel, while remarkable, was not a significant feature of Inca engineering since they did not widely use it in transport or construction. Similarly, while the Incas did build impressive structures, they did not construct pyramids in the same way as other civilizations like the Egyptians or the Maya, which might lead to confusion about their architectural achievements. Lastly, although the Inca did utilize stone arch bridges, this technique was a part of their overall engineering prowess rather than a defining feature of it compared to the monumental scale and impact of their road system.