The age range of 13-19 years is commonly referred to as adolescence or the teenage years. This period is marked by significant physical, emotional, and social changes as individuals transition from childhood to adulthood. During these years, teenagers experience growth spurts, hormonal changes, and the development of secondary sexual characteristics. Teenagers often seek independence and form their own identities, which can lead to exploration of interests, friendships, and values. This age group is also crucial for educational development, as many individuals are in middle school or high school, preparing for future careers or higher education opportunities.