The answer is:
He becomes less concerned with correct behavior.
Shakespeare´s Hamlet narrates the life of Prince Hamlet after his father the king was killed, Laertes kills princa Hamlet thinkin he is risponsable for his fathers death, in this way he grows to be less concerned with correct behavior given the fact that he kills him with a poisoned sword.
I’d say común and popular
Explanation:
Nick said it because of his previous experiences which were not so easy to handle and that have transformed his thoughts so much that he considered that his future would be same as his past. He even didnt remember his birthday, indicating that his mind is well occupied by the menacing experiences and thoughts. Since he has turned thirty so now people think its time to settle but for Nick its still a road of struggle ahead of him
The tone of the poem is how you feel when you read it. The regenade (i believe that is how you spell it) has a sad and lonely tone.
The correct line should be " I hear America singing, the varied carols i hear,"
After claiming that everyone sings, various voices, he goes on to explain who comprises these voices of American singing.