Question

What are the three main factors that cause population change?

Answer 1

Hint: A population is a distinct group of people, whether it is a country or a collection of people who share a common trait. A population in statistics refers to the group of people from which a statistical sample for a study is drawn. As a result, a population can be defined as a collection of individuals who are linked by a common attribute.

Complete answer:
Birth, migration, and death are the three basic variables that generate population change –
i) Birth Rate – There is a population change when infants are born! However, social scientists who research this trend use a few essential phrases. To begin with, a country's fertility rate simply refers to the number of children born. The fecundity rate, on the other hand, is the number of children that could be born in a particular culture. Fecundity, in other words, is the biological capacity of humans to create children.

ii) Death Rate – When people of a community die, the population changes, just as it does when babies are born. This may seem a little morbid, but scientists refer to this as the mortality rate, which is just the number of deaths in society. The number of deaths per 1,000 people is commonly used to calculate this.

iii) Migration Rate – Migration is one key factor that accounts for population changes. Migration, at its most basic level, refers to mobility; it is the flow or circulation of people in communities. Emigration and immigration are the two types of migration. Emigration is the act of leaving one's home country for a new one. The term "immigration" refers to a person's entry into a country other than their own.

Note: It's worth noting that immigration and emigration have no effect on the global population or the number of individuals alive at any particular time. Immigration and emigration simply alter the population of a location. The bulk of the world's population now lives in cities, which has resulted in rapid growth in our urban areas. This is a phenomenon known as urbanisation.