What problem can a boundary change create in comparing population growth?

Correct answer: The base area of comparison can change

Direct answer: D, the geographic base of comparison can change. Population figures describe a defined area during a defined time. If a district gains territory, loses villages, or is divided into new administrative units, its population total may change partly because the boundary changed, not because the people’s demographic behaviour changed. Comparing old data for one boundary with new data for another can therefore give a misleading growth figure. A is false because boundary changes do not make deaths disappear. B is false because the definition of birth rate does not automatically change, although the population used for comparison may differ. C is false because people can continue to move across boundaries. Before comparing growth, check whether the area, boundary, census method, and time interval are comparable. Memory cue: same population measure requires the same place and time basis.