Adolescence is typically divided into three distinct sub-phases, each with unique milestones:
Focuses on rapid physical growth and the beginning of puberty. Teens at this stage often become more self-conscious about their appearance and seek greater privacy. adolescent
The onset of puberty, which triggers rapid physical and hormonal changes. adolescent
Focuses on stabilizing identity, completing education, and entering the workforce. It is increasingly recognized as a "prolonged" phase in contemporary societies. The Adolescent Brain Adolescent Development - The Promise of Adolescence - NCBI adolescent