What did the people of Tenochtitlan farm on?

Answer 1

Chinampas were floating gardens built on swamps. The process of making chinampas was a relatively simple one. First, canals were built through the marshes and swamps. Then, the mud from the canals was placed on mats, which were made from weeds and straw. Then, trees were planted at the corners. When these trees took root, they secured the chinampa firmly in place. Once the floating island was secure and useable, the Aztecs used it to plant their principal crop: corn. They also grew various vegetables such as avocados, beans, chili peppers, squash, and tomatoes and sometimes flowers.