About what did the character Hamlet procrastinate?

marrying Ophelia

finishing his studies

seeing justice done regarding his father's murder

murdering Polonius

The correct answer is:

Seeing justice done regarding his father's murder

Given the situation that. His father died and three months after her mother remarries his father's brother as she turns back on her son. Shakespeare as a writer had to suspend the revenge of the character. So the last thing he does, is killing Claudius as revenge for his father's death,

Hamlet procrastinates seeing justice done regarding his father's murder

Explanation:

Hamlet seeks for justice for his father's death since he sees the ghost who claims to be his father, then the journey to madness of Hamlet begins and starts to think of ways to revenge his father at knowing he had been killed by his own brother, this leads to the inner conflict of the character and is one of the biggest reasons why he keeps on procrastinating it.