Answer:
I don't think that we have the same book intrests because I actually don't read books often.:^
It's going to be setting. Although it was using past pretenses like "was" it isn't a backstory, it wasn't describing the characters or any event. It was only describing the room, the setting. Hope this helps :).
The answer is: tone is the author's attitude towards the subject and audience; style is the way something is written. Hope this helps!