Not quite an adult.
They are still considered someone’s child.
Some are well behaved.
Some are outright wild.
They are certainly not elves or gnomes.
However, I think that their « testy » behavior is due to changing hormones.
They brains seem to steadily grow sponging up all kinds of knowledge.
Not all graduate from high school.
Some do not even make it to college.
This is the same age group where they seem to get a little bold.
Talking a bunch of smack like they are old.🙄
Just think how interesting the world would be if all of them were well behaved and would do what they are told.😁