So Eden sank to grief, So dawn goes down to day

Are these independent or dependent clauses? I need to know why they are independent or dependent clauses.

However, the idea of real-life people living in what would become the united states for thousands of years before columbus ever left spain never dawned on me. what would be the best way to revise this sentence for greater clarity? a) however, the fact that columbus left spain thousands of years after people settled what would become the united states never dawned on me. b) it never dawned on me, however, the idea of real-life people living in what would become the united states for thousands of years before columbus ever left spain. c) however, the fact that people were already living in what would become the united states for thousands of years before columbus ever left spain never dawned on me. d) however, the idea never dawned on me that long before columbus ever left spain, real-life people lived for thousands of years in what would become the united states.

Who calls tyler into his office to fire him his job

In the following line, "so many crazed men, so much shouting, so much brutality, " what type of rhetorical feature is wiesel using to emphasize the image?