What effect does catherine’s allusion to the underground railroad have on the mood if this passage

There isn't a passage to analyze.

Explanation:

Even though there is a lack of passage, there are some things that can be explained:

The Underground Railroad was a secret network of routes and houses in the United States during the 19th century; it is important to mention that there was not literally a railroad but an organized route. The intention of this network wast to help slaves escape into Canada or free states or Mexico. It has appeared in many fictional works, such as Uncle Tom's Cabin, by Harriet Beecher Stowe; or The Planter's Northerns Bride, by Caroline Lee Hentz. Using this element of reality gives any type of narrative a sense of authenticity and puts the reader into the context of slavery, since it is an important piece of abolitionism history.

sight: watching a movie

touch: petting a dog

smell: smelling dinner

hearing: listening to music

taste: eating pizza