B. it conveys the subject of the paragraph.
A topic sentence is the main idea which is the subject of the paragraph.
You can look at the words in front and behind it, because they refer to this big word. You may find a synonym of the word or a close reference. So for example in this sentence: I was excited and ambitious to learn about cars today. So this is a easy example. You can use exited to define ambitious if you dont know what ambitious means.
i think its "Its irony helps the reader understand that such an idea is not acceptable and isn't meant to be taken seriously."
The alliteration creates a fast pace like the horses' hooves.
Answer: “at the fountain”
