What is the purpose of age structures?

A. They provide a way to study the overall age demographics of a population.

B. They can be used to plan for the number of nursing homes needed in a given area.

C. To advocate for small class sizes in schools

D. To know how many children live in a specific community

A. They provide a way to study the overall age demographics of a population.

Explanation:

" it's a summary of the number of individuals of each age in the population. Age structure is useful in understanding and predicting population growth."

Answer: Hence, Option 'a' is correct.

Explanation:

Age structures is the proportion of population that belongs to different age group.

The purpose of age structure is that it provide a way to study the overall age demographics of a population.

With the age structures, we get to know about the prevailing age groups mostly present in particular area or country or world wide.

Hence, Option 'a' is correct.