Which of these describes a universal theme?
a. true friendship lasts forever.
b. space travel is the next step.
c. dance is important.
d. ice climbing is the only true sport.

to see the dragon ball franchise just once

explanation:

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.