All of the following were agricultural hearths, except
a. mesopotamia
b. sub-saharan africa
c. the nile river valley
d. mesoamerica

All of the following were agricultural hearths, except (B) sub-Saharan Africa. Basically, sub-Saharan part of Africa geographically lies in the south of the Sahara desert. Agricultural resources and works are not merely applicable in deserts like Sahara. Vegetation there is very different.

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