A "life stage" refers to a specific period in an individual's development characterized by distinct physical, emotional, and social changes. These stages can include infancy, childhood, adolescence, adulthood, and old age. Each stage has unique challenges and milestones, such as learning to walk in infancy or establishing a career in adulthood. Life stages are often influenced by various factors, including biological changes, cultural expectations, and environmental conditions. Understanding these stages helps individuals navigate their personal growth and adapt to the transitions that occur throughout their lives.