Final answer:
Age structure diagrams are used to study age distribution in populations, predict population growth, and infer economic development.
A pyramidal shape indicates rapid growth common in less developed regions, while a conical shape suggests slow growth in more developed areas.
The Correct Option is; D) To study the age distribution and composition of a population.
Step-by-step explanation:
Age structure diagrams are used by scientists to study the age distribution and composition of a population. These diagrams provide a visual representation of the number of individuals within different age groups in a population and are crucial for understanding population dynamics.
By analyzing the shapes of these diagrams, scientists can predict future population growth trends and infer the level of economic development in a region.
Countries with a pyramid-shaped age structure typically experience rapid population growth and may be less economically developed with higher birth rates and lower life expectancies.
In contrast, countries showing a conical age structure diagram with more middle-aged and elderly individuals are often more developed with slow or stable population growth. Thus, these diagrams are essential tools for demographers, policy makers, and economists alike for planning and resource allocation.