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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