Labor was an important factor in the rise of industrialization, and it came in many forms. laborers participated in indentured servitude when they signed contracts to work in Africa and the Caribbean. used convict labor, sending prisoners to work in Mozambique and Angola. King Leopold III of established a personal colony in Africa, where he used coerced labor to exploit the area’s natural resources for his personal gain.

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; interactionist persprctive;

answer; the changing age structure of the population;

answer; principled stage;