Answer:
B. They are the books that Montag is burning.
Explanation:
Montag's job is to burn books, which contain "history," or the knowledge of the past. In the quote given, this is the only answer choice that would actually make sense.
The second thing you should do when writing a summary is read, think about, and understand the text. Review the material to make sure you know it well.
The underlined words are a metaphor as they compare Fredo to a creature without using like or as.