Question

Which was part of Sumerian farming and trading

Answer 1

Levees held back the annual floods of the Tigris and Euphrates Rivers.

Step-by-step explanation:

This method was also used in Egypt Empire. When floods seasons was comming, they built levees to prevent a disaster, but their crops were full of water, so during this period, The Pharaoh made them work in construction of the big buildings as other workers.

Answer 2

Levees held back the annual floods of the Tigris and Euphrates Rivers. and Surplus barley and wheat could be traded for other things.