The Inca, the Maya, and the Aztec were similar in their specialized economies based entirely around one crop. use of agricultural machinery to improve farm productivity. reliance upon trade with one another to ensure economic stability. use of creative farming techniques to adapt to their physical geography?
1) Specialized economies based entirely around one crop
2) Use of agricultural machinery to improve farm productivity
3) Reliance upon trade with one another to ensure economic stability
4) Use of creative farming techniques to adapt to their physical geography