Yes, this is true!
One of the reasons why this is true is that the person starts to be independent then, so they no longer describe themselves with respect to their parents.
Another reason is that they by this time have developed personal characteristics upon which they can base their identity.
Answer:
population
Explanation:
According to my research on different research categories and terminology, I can say that based on the information provided within the question the entire group of American adolescents is an example of a population. This is because a population is defined as all the organisms of the same group or species, which live in a particular geographical area. Which is the category that American Adolescents falls under since it is describing an age range within a certain geographical area.
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