In which of the following regions was the Aztec civilization located?

Africa

Mesoamerica

The Andes

South America

Mesoamerica

Explanation: The Mesoamerican civilization stems from their Spanish conquerors who included missionaries and the military. It has it's deep sources from archaeological findings which were discovered years after the civilization among'st other studies. This is mostly the wide spread present day Mexico.

The answer is that they arrived in Mesoamerica in the 13th century