Final answer:
The age and sex composition of a population does affect its social life.
Step-by-step explanation:
The age and sex composition of a population does indeed affect its social life in many ways. Changes in the age composition of a population, which can be due to changes in birth rates, can lead to a shift in the proportion of aged individuals and children within a population. For example, in many countries, the proportion of aged individuals is increasing, while the proportion of children is decreasing.