Final answer:
The Post-Classic Mayan Civilization used advanced irrigation systems and slash-and-burn farming techniques to sustain their agriculture, with maize being the staple crop that played a significant role in their diet and cultural practices. Option a) is correct.
Step-by-step explanation:
In the Post-Classic Mayan Civilization, agriculture was characterized by advanced irrigation systems and slash-and-burn farming. The Mayans modified their environment extensively, creating raised fields to manage water during wet periods and increasing their yields.
Additionally, they utilized canals and terraced hillside farming in mountainous areas to preserve flat land for planting. While they did not have large grazing animals or cereals like wheat or barley, maize was the staple of their diet and held a central place in their culture and religion.