Why were the Aztecs able to take control of the basin known as the Valley of Mexico?

Read what our textbook says about this for help!

"One of these basins- the Valley of Mexico- was the center of the Aztec empire. Fertile volcanic soils and water flowing from the mountains around it made the valley a good place to settle. At the center of the Valley of Mexico was a large lake, Lake Texcoco. The Aztec could easily defend their city from attack. The lake itself and the canals the Aztec built made transport easy. " (World Geography, page 170)

(1 point)
Responses

They produced goods that made them wealthy
They produced goods that made them wealthy

They built a strong defense that protected Lake Texcoco from invasion
They built a strong defense that protected Lake Texcoco from invasion

They were the second people to settle in the area and create cities there

They were the second people to settle in the area and create cities there