1-Theme of Revenge
We can see how Laertes leave France and come to Denmark to revenge his father‘s death and his sister’s madness.
2-Theme of unhappiness
We can see how Ophelia is unhappy because her father died and even lost reason and understanding.
3-Theme of Death
We can see how Ophelia is death; when she fell in a river and drowned
4-Theme of Kindness
We can see that when Ophelia is death, the king and the queen followed Laertes to offer him their sympathy and comfort beside Ophelia’s body.