When the he said "i am a citizen of this world" , it related to when Ram has to changed to be able to live in the house, and basically pretending to be someone he is not
He should be able to rent a place without having to pretend to be someone else is the meaning when he said it
hope this helps
C. Identity and home (Apex) is correct just did it ;)
C. You need a comma when the sentence changes subjects from humans to bottlenose dolphins.