Life stages refer to the distinct phases that individuals go through from birth to death. These stages typically include infancy, childhood, adolescence, adulthood, and old age. Each stage is characterized by specific physical, emotional, and social developments that shape a person's identity and experiences. During these life stages, individuals encounter various milestones, such as learning to walk in infancy, starting school in childhood, and pursuing careers in adulthood. Understanding these stages helps in recognizing the changes and challenges people face throughout their lives, contributing to personal growth and societal development.