In 1-2 sentences, explain one thing that should be included in a conclusion and one thing that should not be included? please help, thank you

One thing that should be included in a summary is the general and or universal topic of whatever you are summarizing. One thing that should not be included in a summary is a personal opinion on what you are summarizing.

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.