Teenagers, also known in slang as fairy age, age, and Teenage (13-19 years old, in English, this range is read with the tail "-teen", so this age range is called "teenage". and people in this stage are also called "teenager", "teenage boy / girl") is a period of physical and mental transition in human development that takes place between childhood and adulthood. This transition is related to biological (eg puberty), social, and psychological changes, although the biological and psychological changes are most noticeable. Historically, puberty is often associated with adolescence (13-19) and the onset of adolescent development. [1] [2] However, in recent years, the onset of puberty has seen an increase in adolescents (especially females, as seen with early puberty); sometimes adolescence is extended beyond teenage (especially in men). These changes have made it difficult to definitively define the adolescent time frame. [3] [4] [5]

The end of adolescence and the onset of adulthood differ from country to country and by function, and moreover even within a country or culture there are different ages for each individual. is considered (by age and legal) old enough to be entrusted by society with some responsibility. Those milestones include, but are not limited to, driving, having legal sex, performing military service or joining a jury, buying and drinking alcohol, voting, entering into contracts, compete for several levels of education, and get married.

Adolescence is often accompanied by an increase in the degree of independence allowed by the parent or guardian and reduced supervision, as opposed to adolescence (pre-teens).

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