Which approach is most correct while analysing population change at expert level?

Correct answer: Considering births, deaths, migration, age structure and the time period together

Direct answer: Option B is correct. Expert analysis studies population change as the result of interacting processes rather than treating one statistic as the whole explanation. Births and deaths determine natural increase or decrease. Migration may add or remove people, while age structure shows whether future births, labour supply or dependency pressure may change. The time period is essential because a short-term movement may have a different meaning from a long-term trend. Option A is wrong because birth rate alone ignores deaths, migration and age composition. Option C is wrong because area does not measure demographic change. Option D is wrong because memorising density gives a number of people per unit area but does not explain why population changes. A sound analysis compares all relevant factors and checks their direction and timing. Memory cue: ask who is being added or removed, by which process, and over what period.