Final answer:
The Poverty Point Indians relied mostly on farming, growing crops such as rice, millet, wheat, barley, lentils, and peas. They considered cows sacred but used them as draft animals and for milk.
Step-by-step explanation:
The Poverty Point Indians relied mostly on farming as their main source of sustenance. They grew crops such as rice, millet, wheat, barley, lentils, and peas. Farming was more important than cattle raising for them, as they considered cows sacred but used them as draft animals. They also benefited from the fertilizing properties of cow manure and the nutritional value of their milk.