difference between pre colonial and and colonial economy

 http://myfreeschooltanzania.blogspot.com/2014/07/similarities-and-different-between-pre.html#:~:text=EAST%20AFRICA%3A%2D-,Colonial%20economy%20was%20based%20on%20land%20alienation%20While%20Pre%20colonial,not%20based%20on%20land%20alienation.&text=Pre%20colonial%20economy%20in%20east,were%20force%20to%20use%20money.