Why did the aztecs settle in the valley of mexico?

(a.) they wanted to take over abandoned mayan cities.
(b.) the area was located near a major river system.
(c.) the valley had a warmer climate than the mayan lowlands.
(d.) surrounding volcanoes created fertile soil in the valley.

1. discovered the new world balboa 2. explored the north american southwest hudson 3. his crew was the first to sail around the world vespucci 4. conquered the incas of peru cortes 5. discovered the pacific ocean columbus 6. conquered the aztecs of mexico cabot 7. discovered fishing grounds off newfoundland pizarro 8. looted spanish vessels for england drake 9. claimed the hudson river area for dutch coronado 10. priest who explored the mississippi marquette 11. man for whom the new world is named magellan