How does Bram Stoker use the story of Demeter to create suspense?

Bram Stoker uses the story of Demeter in "Dracula" to build suspense by drawing parallels between Demeter's grief over her daughter Persephone and the anguish felt by Mina Harker when her friend Lucy is transformed into a vampire. This creates a sense of impending doom and heightens the tension as the characters face the threat of the vampire. Stoker also uses elements of the Demeter myth, such as the motif of loss and longing, to emphasize the Horror of Dracula's influence over his victims.