The document outlines the five main stages of human life: babies (0-3 years), children (4-11 years), adolescents (12-20 years), adults (20-60 years), and elderly (60+ years). Each stage is characterized by physical, mental, and social developments. Babies discover the world and need full parental care. Children's language and motor skills grow as they learn and start taking on responsibilities. Adolescents experience bodily changes and prepare for independence by focusing on education and future careers. Adults are in their prime working years and often start families. The elderly are retired, less physically able, and sometimes require assistance from others.