Which plot technique is used in this excerpt from "The Cask of Amontillado" by Edgar Allan Poe?

The plot technique used in "The Cask of Amontillado" by Edgar Allan Poe would be the 'unity of effect'. This is the answer because everything connects and is relevant to the story. It contains the standard elements of a plot, namely, exposition, conflict, rising action, climax, falling action, and resolution.