How is the population determined to be rural instead of urban

Rural areas have fewer people

Explanation:

This is the explanation that best describes how a population is determined to be rural or urban. In the United States, a rural population is an area that has a population of less than 2,500 people. On the other hand, urban areas have more than 2,500 people. However, as this definition can be unclear, other factors are also taken into account. For example, in rural areas, most people work on agriculture or other natural resource-based occupations, while urban populations depend on a great variety of occupations that are not necessarily related to natural resources.

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; i believe the correct answer is (8) eight.