Caesar is in danger on the Ides of March, especially in light of Cassius' plot against him. It means Caesar's is in danger on that day.
I think its letter d if I really don't know this stuff but I'm trying to help someone I just in elementary school
C-! That means the aren't fully mature due to coming early
He's trying to describe a physical feeling that he's experiencing. He used a metaphor to try to explain his heartache and what he feels about his loss.