Which option correctly explains a limitation of population size?

Correct answer: It tells total number but not where people are concentrated

The direct answer is A: population size tells the total number of people but not where they are concentrated. Population size answers “How many people are there?” It does not answer “Where do they live?” Step by step: count the total population; this gives size; then examine the location of people across districts or regions; that separate study gives distribution or density. Option A is correct because two areas may have the same population size but very different patterns: one may be concentrated in a small city while the other is spread over a large region. Option B is wrong because people per square kilometre is density, not always population size. Option C is wrong because resource quality requires separate information about water, soil, minerals and services. Option D is wrong because climate is a physical condition, not the meaning of population size. A total number is useful, but it must be combined with distribution for sound planning. Memory cue: size is “how many”; distribution is “where.”