A _____ is a graph that represents the age and sex of a population.

• A. Population pyramid
• B. Line chart
• C. Bar graph
• D. Pie chart

Answer: (A)

A population pyramid visually represents the age structure and sex composition of a population. It lays out age groups along the vertical axis and shows how many people of each age exist for each sex, usually with one side for males and the other for females. This setup makes it easy to see patterns such as a large base indicating a young population or a top-heavy shape signaling aging, as well as any sex imbalances within age groups. Line charts track changes over time or relationships, bar graphs compare quantities across categories but don’t reveal the full age-and-sex structure, and pie charts show proportions of a total without detailing how those proportions are distributed by age and sex.