Why did the Aztec in tenochtitlan need aqueductsdikes causeways and canals?

The Aztecs in Tenochtitlan needed aqueducts, dikes, causeways, and canals to manage water resources, control flooding, and facilitate transportation and trade within their city built on a marshy island in Lake Texcoco. These engineering structures helped them overcome the challenges posed by their environment and allowed for efficient circulation of goods and people.