Answer:
The strongest element that represents the tragedy in the book is the end with the death of the two lovers
"JULIET: Yea, noise? Then I'll be brief. Or happy dagger!
[Snatching ROMEO’s dagger]
This is thy sheath;
[Stabs herself]
there rust, and let me die.
[Falls on ROMEO’s body, and dies] "(ACT V)
In a rational way, it is difficult to analyze the romantic love between the two, since it is very fleeting and idealized, how is it that they marry within a few days of meeting
"JULIET: Here’s such a coil! Come, what does Romeo say?
NURSE: Have you got leave to go to shrift to-day?
JULIET: I have.
NURSE: Then hie you hence to Friar Laurence’s cell;
There stays a husband to make you a wife "(ACT II)