The Maya and the Aztec took advantage of the swampland throughout Mesoamerica. What is the main reason both of these cultures found the swamps useful? Select the best answer from the list below.

1.The swamps were a way to keep their enemies from reaching their cities.

2.The swamps were a source of fresh water.

3.The swamps could be drained and used to build houses on.

4.Animals that could be used as food lived in the swamps.