What effect did the geography of mesopotamia have on trade?

Hello,

The land is quite fertile due to seasonal rains, and the rivers and streams flowing from the mountains. Early settlers farmed the land and used timber, metals and stone from the mountains nearby. Southern Mesopotamia is made up of marshy areas and wide, flat, barren plains.

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name two ways organisms join a population and two ways organisms leave a population. two ways organisms join a population are birth rate and immigration. two ways they leave are death rate and emigration.

explanation:

they supported black codes so the answer is a or b