Which technique did the zapotec use to farm step mountain terrain. A they use llamas to farm. B they use terrace farming. C they grew high altitude crops. D they built cisterns to store water.

Option: D. they built cisterns to store water.

Explanation:

The Zapotec people became known for their farming in the Americas. Their dams, canals, and terraced fields carried and stored irrigation water. The Zapotec grew corn, squash, beans for people in cities and villages across the region. The archaeologist has found cisterns in the Monte Alban, which was the ancient Zapotec capital located in southwestern Mexico. Rainwater stored in the cisterns and it was necessary because they lived in a dry land region which received no very less rainfall in a year.