The active human population is determined by its

The question is asking about what determines the active human population. The options given are: racial combination, male-female ratio, age distribution, height difference, and density per km².

To determine the active human population, we need to consider factors that affect the number of people who are able to participate in activities and contribute to society.

Racial combination (Option A) refers to the different racial groups in a population. While race can influence cultural practices and traditions, it does not directly determine the active human population.

The male-female ratio (Option B) refers to the proportion of males to females in a population. While gender can influence certain roles and responsibilities in society, it also does not directly determine the active human population.

Age distribution (Option C) refers to the proportion of people in different age groups within a population. This is an important factor in determining the active human population as it affects the labor force and the ability of individuals to participate in various activities.

Height difference (Option D) does not have a direct impact on determining the active human population. It is not a relevant factor in this context.

Density per km² (Option E) refers to the number of people living in a specific area. This can have an impact on the active human population as it relates to the availability of resources, infrastructure, and opportunities for participation in economic and social activities.

Based on the options provided, the correct answer is age distribution (Option C) as it directly influences the active human population by determining the number of individuals who are able to participate in various activities based on their age.

To learn more about this topic, please refer to the relevant sections of your Geography textbook.