The key differences in the distribution of power within each system center on the amount of authority and power that is held by the

Explanation:

This  is called the Division of Powers, this helps limit the power of all the three Branches. This authority is held between the legislative branch.    

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.

think its caste system

explanation: