What geographic factors led to the decline of sumer?

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the cultivated soil had poor drainage.

the tigris and euphrates rivers flooded every year, leaving behind dark, fertile soil.

grain fields of one city–state bordered those of another, which caused territorial wars.

it was located in a flat plain, and isolated from trade routes.

Which of the following was a characteristic of government proposed by the new jersey plan? it denied congress the ability to levy taxes. it based representation on population rather than keeping states equal regardless of size. it denied congress the ability to regulate trade. it preserved an executive committee rather than adopting a singular president.

Which group was responsible for determining the borders of african colonies and later countries

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?