Which was part of Sumerian farming and trading? Surplus barley and wheat could be traded for other things.

Lumber, stone, and gold produced in Sumer could be traded for food.

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

d will be ur answer

to mark sum 1 brainliest there has to be 2 answer at least

i believe your answer is d)

basic principles: federalism, separation of powers, checks and balances, judicial review, representative democracy, limited government, rule of law, individual rights and responsibilities, consent of the governed, majority rule, popular sovereignty, equal protection.

that would be the steamboat because none of the other things are forms of transportation