The correct answers are:
c. They irrigated dry land to expand their farmlands.
- The Sumerians used the advantages of the mother nature that were on their disposal, so the two big rivers, Tigris and Euphrates rivers, were used for irrigation of the dry land, thus managing to expand their farmlands and produce more food.
d. They used oxen-drawn plows and seed funnels to plant crops more quickly and easily.
- The oxen-drawn plows and seed funnels were very important inventions which enabled the processes of planting and working on the farmlands much more easier and quicker, plus it required less human effort because the oxen were the ones that performed the hard physical part.
