Look at the age-structure pyramids. the numbers between the bars (in the middle of the graphs) serve as the y-axis. what do these numbers represent? a) the age classes, in 5-year ranges b) the number of people born in a particular year c) the total population, in millions the population of males and females d) the percentage of the population in each age class.

A) The age classes, in 5-year ranges

Explanation:

The number between the bars are the age classes, and the bars represent the populartion, in millions, belonging to the corresponding age class.

A population pyramid like the one attached below usually does not show the number of people born in a particular year. However, this information can be estimated by looking at the year the population pyramid was elaborated, and substracting from that year the corresponding ages illustrated in the pyramid.

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