While you may feel like you're fully developed at 16, the truth is that you're still growing and changing.
Physical Development
Physically, most individuals reach their full height by their late teens or early twenties. However, muscle mass, bone density, and other physical characteristics continue to develop into your early twenties.
Brain Development
Your brain is still developing throughout your teenage years and into your early twenties. The prefrontal cortex, the part of the brain responsible for planning, decision-making, and impulse control, is one of the last areas to fully mature.
Emotional and Social Development
Emotionally and socially, you are also in a period of significant growth. You are learning to navigate complex relationships, develop your identity, and understand your place in the world. These aspects of your development can continue well into your twenties.
Conclusion
While you may feel like an adult at 16, remember that you're still in a phase of significant development. Be patient with yourself and continue to learn and grow.