A graph that best displays the distribution of population sizes among several categories is a:

• A. Bar graph
• B. Map
• C. Line graph
• D. Pie graph

Answer: (A)

Bar graphs are best for comparing population sizes across different categories. Each category gets its own bar, and the height shows its population size, so you can quickly see which categories have more or fewer people. This makes it easy to visualize how the distribution looks at a glance. Maps show geographic locations, line graphs show changes over time, and pie graphs show parts of a whole as percentages—seen all at once, they don’t compare multiple categories as clearly as separate bars. So a bar graph is the best choice for this purpose.