Final answer:
A cohort is a population group distinguished by a specified common characteristic, such as people born between specific years. Age cohorts provide insights into social and cultural factors and can help with planning for future challenges.
Step-by-step explanation:
A cohort is a population group distinguished by a specified common characteristic. An example of a cohort is an age cohort, which is a group of people born within a specific time frame, such as between 1985 and 1990. Age cohorts can provide insights into social and cultural factors and help with planning for future challenges. Age cohorts are used in demographic studies and social sciences.