Question

What is the reason behind the study of the population of various place, region or a country

Answer 1

Answer:

In biology, a population is all the organisms of the same group or species who live in a particular geographical area and are capable of interbreeding.[1][2] The area of a sexual population is the area where inter-breeding is possible between any pair within the area and more probable than cross-breeding with individuals from other areas.[3]

In sociology, population refers to a collection of humans. Demography is a social science which entails the statistical study of populations. Population, in simpler terms, is the number of people in a city or town, region, country or world; population is usually determined by a process called census (a process of collecting, analyzing, compiling and publishing data).