Why might a narrative nonfiction text use a narrative arc

They should serve the overall theme and subject of the story rather than being superfluous or appearing to simply pad the story. Smaller arcs may also be used for maintaining interest and tension by introducing new stakes in the conflict of the main protagonist.

Explanation:

true

explanation:

i believe the answer is: b. mr. head had a long, tube-like face with a rounded open jaw and a short depressed nose.

this is because in the un-revised sentence it said that mr. heads face was long and tube-like, and he had a rounded open jaw. this is not a very grammatically correct because of how it seems to drag on with the and, replaced with, with, makes it sound more fluent in the description.