If the total population of an area is declining but the density of some towns is rising, what should be understood?

Correct answer: People are internally concentrating in towns

Correct answer: A. Total population describes the whole area, while town density describes the number of people per unit of area in particular towns. These measures can move in different directions. For example, people may leave scattered villages or remote places and move to towns for jobs, education, health care or other services. The wider region may lose population, yet the towns receiving those people may become more crowded and their local density may rise. B is incorrect because density remains a useful measurement even when population changes. C is incorrect because populations can decline through out-migration, lower birth rates or other demographic processes. D is plainly false because towns are places where people live. Memory cue: always ask, “Is the statistic for the whole region or for a small local place?” Total change and local concentration are not the same thing.