Question

which term is defined as the number of people per unit of area? population density population change population structure population distribution

Explanation:

Population density is calculated by dividing the total population by the total area, representing people per unit of area. Population change refers to the increase or decrease in population over time, population structure is about the composition of a population (e.g., age - gender distribution), and population distribution is about how people are spread out geographically.

Answer:

population density