Why is the study of processes of population change useful for administration?

Correct answer: To understand service demand and future planning

Direct answer: A, to understand service demand and plan for the future. Administration needs information about births, deaths and migration because these processes change the number, age structure and distribution of people. Step by step, population data show how many people live in an area; this helps authorities estimate the need for schools, hospitals, housing, transport, water, sanitation and employment support. Migration data also show where people are arriving or leaving, so resources can be distributed more fairly. A is correct because it connects population information with practical public planning. B, C and D are wrong because the taste of a river, sound of a mountain and language of soil are not purposes of studying population change. Memory cue: population data help governments decide what services are needed, where and when.