When an author injects his or her own thoughts or opinions on the stories events into the conclusion of a story, this is called

When an author injects hir or her own thoughts on the stories events into the conclusion of a story, this is called Third-Person, subjective.

Explanation:

This is the narrative voice classification. We might say it is de Third-Person subjective because the narrator includes thoughts, feellings and opinions in the story. This is the opposite of an objetive kind of narration, in which no feellings or opinions are involved.

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.