Mark each statement if it was part of sumerian farming and trading.
a.
levees held back the annual floods of the tigris and euphrates rivers.

b.
surplus barley and wheat could be traded for other things.

c.
lumber, stone, and gold produced in sumer could be traded for food.

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

B. Surplus barley and wheat could be traded for other things.

Explanation:

The Sumerians were a group of people who lived in ancient Mesopotamia, nowadays southern Iraq. This is the first culture that we know of in Mesopotamia, which is considered the "cradle of civilization." Therefore, they were one of the first civilizations in the world. Sumerian agriculture and trade were very developed. Farmers were able to grow grain and other crops through the use of levees that held back the floods. They also developed a system of irrigation.

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explanation:

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

explanation: