Why is the study of population growth useful for students?

Correct answer: It explains the number of people, their needs, and planning

The correct answer is A: the study explains the number of people, their needs, and planning. Population growth is not merely a count; it helps us understand how the number of people changes and how that change affects food, water, housing, schools, hospitals, transport, employment, and other resources. Governments and communities use population information to estimate demand and plan services more fairly. Option A is correct because it connects population knowledge with human needs and development planning. Option B is wrong because drawing may be a useful classroom skill, but it is not the purpose of studying population growth. Option C is wrong because sea depth belongs mainly to physical or marine geography, not this basic population concept. Option D is wrong because a mountain’s sound is unrelated to population measurement or planning. Memory cue: population study helps answer three questions—how many people, what they need, and how to plan for them.