Which age group is classified as adults?

The classification of adults typically begins at puberty, when individuals experience significant physiological and hormonal changes that signal the transition from childhood to adulthood. This stage marks the development of secondary sexual characteristics and is often associated with increased independence and responsibility in societal contexts. Thus, individuals classified as adults are generally those who have reached puberty and beyond, as they are considered capable of engaging in adult roles and responsibilities. Other age groups listed do not encompass the full definition of adulthood, as they include individuals who are still classified as infants, children, or adolescents.