What is the graphical representation of age structure known as

The age structure is a population pyramid which depicts the population of a country and what is the age of the average population of a country.It can be depicted with the help of pyramid. A population pyramid, also called an age pyramid or age picture diagram, is a graphical illustration that shows the distribution of various age groups in a population, which forms the shape of a pyramid when the population is growing.

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Explanation:

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

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sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.