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 :).
I believe the pronoun in this sentence is <u>your key</u>.
It is their anthem, for example like the pledge of allegiance for america is our anthem.
Answer:
Nobody can help you with this because we aren't you.
Explanation: