It is the elements of death, sorrow and loneliness that make up the gothic elements of Frankenstein. His thirsts for knowledge combined with his obsession with resurrecting life provide haunting elements in the story. This goes deeper as the story progress and plot thickens more dark themes in the story.
I believe the answer is: A supernatural event
Gothic literature is Characterized by various components of death, horror, or desperation throughout the literature.
Supernatural event where dead body can be made to live again could be considered as a horror component in goth literature.
