In "Frankenstein", by Mary Shelley, the two themes that are most developed are option a) The need for companionship and the consequences of revenge.
In the novel, the need for companionship is shown in Victor's isolation from family and society in order to create and maintain his creation a secret. Victor's constant and secret studies, that isolate him, make him forget the responsibilities of an ordinary human being. Isolation is also the cause of the monster's anger, hatred, and revenge, making Victor as isolated as he is. "For the first time the feelings of revenge and hatred filled my bosom, and I did not strive to control them..."
