Question

.
For centuries, the Inca civilization was well hidden from Spanish invaders and explorers. What protected this unique culture from outside influences?

Inca settlements were usually protected by armed guards who kept intruders out.

Inca settlements were difficult to find and reach because they were build at high altitudes on rough terrain.

Most Inca settlements were hidden by the thickly growing vegetation of South American rain forests.

Inca settlements were usually hidden by dense fog and located in swamps that were hard to navigate

Answer 1

Inca settlements were difficult to find and reach because they were built at high altitudes on rough terrain.

Explanation: The Inca lived in the Andes, building cities, terraces, and fortresses high on steep mountainsides (e.g., Machu Picchu). That rugged, remote terrain — with narrow trails, steep slopes, and altitude — made access difficult for Spanish explorers.