How would you describe the diffusion of civilizations in Africa and the Near East?

The diffusion of people and language took place widely across the continent. Through the movement and spread of the languages it brought about some type of ancient development in food production and movement of peoples within the continent. For example the Nilo-Saharan language may have originated among fishing.

it increase by 12% a year from 1812-1820

b) new machinery hope i