thematic continuity + transitions + active verbs

What I want you to notice here is the thematic continuity across the two paragraphs of the subsection. The subsection is entitled "adolescence." And then, even a paragraph later, adolescence is still being talked about. This is the topoi of time or duration.

Also notice the transition words and the active verbs.

You'll also notice other topoi, such as prevalence and likelihood. But time dominants.