When European nations established colonies in Africa in the late 1800s, they

controlled colonies’ government but gave colonies economic control.
allowed colonies to run their government but held economic control.
exercised complete economic and political control over the colonies.
negotiated with colonies to determine economic and political control.

Explanation:

They set up Imperial governments in the land to  exploit the natural and human resources of the continent.  

Each European  countries involved  aimed to increase its prestige  by accumulating territories in other parts of the world including Africa. By 1900,the Berlin conference to divide Africa brought about nominal control of African territory by Europe. All this was done without the consent of African people.

The European nations basically want cheap labors that they cannot get from their own country..so in search of cheap labors they set up a base at south Africa and stated deporting slaves..

The European nations sought to expand their economies  by obtaining raw materials from Africa which could be transported back to domestic factories and turned into manufactured goods for sale at the expense of the African people.

increase in population

i will get back to you let me look in my notes and i will tell you shortly