Why did the Aztecs settle on an island on a large lake?

The Aztecs settled on an island in Lake Texcoco primarily for strategic reasons. The island provided natural defenses against potential invaders and allowed them to control trade routes on the lake. Additionally, the rich resources of the lake, including fish and waterfowl, supported their agriculture and sustenance. This location facilitated the development of their complex society and capital, Tenochtitlán.