Answer:
c ....how does these details affect the mood or emotional setting

In the English language, the word "who" is almost always used as a pronoun.
It represents a person, similar to the words "I" and "me".
Answer:
The last one: Ravi is having a bad day
Explanation:
All of the other sentences are about what is happening on this day for Ravi while the last one encompasses them all because everything that is happening to him is bad.