Human life stages are typically divided into several key phases: infancy, childhood, adolescence, adulthood, and old age. Each stage is characterized by specific physical, emotional, and social developments. For example, during infancy, individuals rely heavily on caregivers, while childhood involves learning basic skills and social interactions. As individuals progress into adolescence, they experience significant changes, including puberty and increased independence. Adulthood is marked by responsibilities such as work and family, while old age often involves reflection on life experiences and coping with physical changes. Each stage plays a crucial role in shaping a person's identity and experiences.