What is the sum total of human resources available in a country called?

The sum total of human resources available in a country is called its population. Population refers to the total number of people who live in a specific geographic area, such as a city, state, or country. It is usually measured by a census, which is a survey that counts every person in a given area. Population is an important measure of a country's human resources because it can provide insight into the size and demographics of the workforce, as well as the overall social and economic characteristics of the country. Therefore, the total number of people living in a country is called its population.