It would be A.
That hat looks quite good on you.
You would use well to describe an action.
Some examples;
She danced well in the competition.
You speak French very well.
The cake is good.
That sweater looks good on you.
I hope this helped!
The author of a book wants to make the reader feel what the topic of book is about. for example if the book is sad, the author wants the reader to feel those emotions.
Another synonym for torrid is sweltering, because the definition for torrid is hot.