Early mesopotamians turned to dry farming because a. the scratch plough broke up the soil b. seasonal floods made the land fertile c. the amount of rainfall supported the crops d. irrigation systems provided water from the rivers

B. seasonal floods made the land fertile

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*they relied on floods because they had such dry climate

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B. seasonal floods made the land fertile

Explanation:

Mesopotamia is the name by which the zone of the Near East located between the Tigris and Euphrates rivers is known, although it extends to the fertile zones contiguous to the fringe between both rivers, and that approximately agrees with the non-desert areas of the present Iraq and the border area of ​​the north-east of Syria.

Inland, Mesopotamia, agriculture and livestock were imposed between 6000 and 5000 a. C., assuming the full entrance to the Neolithic During this period, the new production techniques that had developed in the initial Neolithic area expanded in the later development regions, including the interior Mesopotamia. the development of cities. Some of the first were Bouqras, Umm Dabaghiyah and Yarim and, later, Tell es-Sawwan and Choga Mami, who formed the so-called Umm Dabaghiyah culture. Later this one was replaced by the cultures of Hassuna-Samarra, between the 5000 and the 5600 a. C., and Halaf culture between 5600 and 4000 a. C. (Late Halaf).