In Africa's largest country, Sudan, there have been decades of fighting as southerners struggle to separate from an administration dominated by those from the north. As the southerners are seeking cultural and political independence, this is an example of .

Secession

Explanation:

The formal withdrawal of eleven southern states from the Union in 1860 which precipitated the American Civil War.

This Caused/Played a role in the beginning of the Civil War.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

you probably know the answer. stop asking stupid questions and making me waste my time. j.k. ; )   b.t.w. what are three ratios equivalent to 5 : 11? thx