Which situation represents an internal conflict? a. jennifer decides to make brownies, but she can't find the eggs. b. bobi's video game console is broken, so she doesn't buy any new games. c. landon must decide whether to go on a senior trip now that his best friend can't go. d. scraps the cat fights off the neighbor's dog with her clawing and jumping skills.

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.