The correct option is C c) 1.Post-reproductive
2.Reproductive
3.Pre-reproductive
Age structure depicts the number of individuals in different age classes.The data is divided by gender, with males on one side and females on the other. Each stack is the population number or population percentage in each 10 year age interval. Furthermore the stacks can also be grouped together into prereproductive(0-15), reproductive(15-45) and post reproductive(45-80) years of the population.