The is the informal designation for the heads of the major federal government departments.

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.

answer; john locke;

answer; marvin gaye;

answer; soren kieregaard was a 19th century danish philosopher;