What factors most contributed to the flourishing of great civilization in africa between 400 and 1600?

I was really confused with this I tried but I couldn't get it

3 answers

That's a span of 1,200 years! Read, read, read:

https://www.google.com/search?sourceid=navclient&aq=&oq=History+of+Africa+-+&ie=UTF-8&rlz=1T4VRHB_enUS648US649&q=history+of+africa&gs_l=hp..0.0i30l5.0.0.5.274977...........0.y_0LSdSEouc
http://www.google.com/search?sourceid=navclient&aq=&oq=History+of+Africa+-+&ie=UTF-8&rlz=1T4VRHB_enUS648US649&q=history+of+africa&gs_l=hp..0.0i30l5.0.0.5.274977...........0.y_0LSdSEouc
okay i got the answer thank you soo much