Which term describes the makeup of males and females across different age groups in a population?

The term that accurately describes the makeup of males and females across different age groups in a population is population structure. This concept encompasses not only the gender distribution but also the age distribution within a population, illustrating how many individuals there are in different age brackets and how these are divided between males and females.

Population density refers to the number of individuals living per unit area and does not consider gender or age factors. Age distribution focuses solely on how individuals are spread across various age segments, lacking the gender aspect. The gender ratio specifically compares the number of males to females without providing insights into the age groups involved. Therefore, population structure is the most comprehensive term, as it includes both gender and age demographics to effectively describe the composition of a population.