integral would mean important, for if something is a "whole" of something, then it must be vital.
C. Exhilarated
When we look at text and try to determine mood, we should look for the tone of words that help to establish this. Thus, for an exhilarated mood (which could be negative or positive as it simply refers to an elevated/heightened level of bodily functions), we should look for words that mean something similar and/or phrases that allude can contribute to this feeling. That said some words that lend to the exhilarated mood are fearful, breathless, timid, adventure, drawn, and blood which coursed in her veins.
The light being put away and the neighbor holding the lamp are the two things being compared i’m pretty sure
A. the subject of paragraph