What theme of the play hamlet is apparent in these lines?
alexander was buried, alexander returneth to dust; the dust is
earth; of earth we make loam; and why of that loam whereto he
was converted might they not stop a beer-barrel?
imperious caesar, dead and turn'd to clay,
might stop a hole to keep the wind away.

Hamlet is one of Shakespeare's most troubled characters, and he contemplates on life and death quite a lot. In these lines it is apparent that death is inevitable, it will come for us all no matter who we are. Both Alexander and Caesar were once great men, it seemed it was impossible for them to die. But they did, the same way every living creature will eventually. We will die, and turn to dust, then to earth, and so on. No one can escape that fate, no matter how hard we try. Regardless who you are in life, you will share the same doom with every other creature that once lived.