I am pretty sure that many villages in the Sahel have been settled at the edge of the Sahara. I choose the option C because It seems to me that you are referring era of Sahelian Kingdoms and If so, most odf them were settled <span>at the edge of the Sahara. Do hope you will find it helpful!
Regards.</span>
Diffusion- the spread of cultural traits from one society to another...
it's the 3rd answer
because u have 1234 options so yeah that's why
I think C! Not that sure though lol
I think the answer is
"North America"