Commonlit -a dream without a dream
part a: which sentence best describes a theme of the poem? a our loved ones usually leave us. b nothing in life is permanent. c it is important to hold on to your dreams. d we cannot slow the passage of time.

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.

better now, by post malone

try