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Girls and boys both start going through puberty, with lowering voices, growing body hair, active sweat glands, and changes in genitals. They are becoming more self conscious but also forming an identity. -
Boys' muscle mass will increase, as will girls' body fat. They will start questioning school and family rules, and push boundaries to show independence. They also may become moody and disinterested. -
At 15, adolescents tend to start fighting with family more and turn to their friends for support. -
At 16, they often want to fit into their friend groups and will change parts of themselves based on their peers. They are becoming more comfortable with their psychical changes as well. -
At 17, they are developing more of an individual identity, and they are considering the feelings of others as well as making plans for the future. -
18 is a step into adulthood and is often associated with going off to college. They are gaining independence while also becoming closer to family again. -
At 19, they are more likely to be focused on their partner rather than friends, and they are working towards goals. They are usually okay with their body image. -
This is the last step to adulthood, with realistic career goals and formed values and morals -
At 21 we are at our psychological peak, and exploring full independence and working towards goals -
At 22, people are often still working towards goals, and there can be changes in their bodies like weight gain and acne. -
At 23, people are feeling confident setting their own terms and can fully understand abstract concepts. -
At 24, a person's brain is essentially fully developed and they have typically gained full independence and built strong personal relationships.