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This document outlines the key physical, intellectual, autonomy, body image, peer group, and identity developments that occur during the three stages of adolescence - early (ages 12-14), middle (ages 15-16), and late (ages 17-19). During early adolescence, puberty begins and causes mood swings while peers become increasingly important. In middle adolescence, physical growth nears completion and abstract thinking develops along with conflicts with family over independence. During late adolescence, physical and sexual maturity levels off and one starts planning for the future while relating more to peers as individuals than a group. The document also includes personal reflections from the author on their experiences with the internet, music, and favorite bands during their own