The answer is...
What is going on inside of Gregor's head
APEX
The climax of the plot is typically considered to be the most exciting element. It is the point of highest tension, where the conflict reaches its peak and the outcome becomes clear.
Plot (apex)
A character‘s inner thoughts and conflicts
Plot (apex)
Denouement
Aristotle believed that the plot is the most critical element of drama because it is the arrangement of events that leads to the catharsis of emotions in the audience. A well-structured plot with a clear beginning, middle, and end is essential for engaging the audience and inducing a sense of fulfillment or resolution. Without a well-developed plot, other elements such as character and theme may not effectively resonate with the audience.
Conflict
The exposition is typically the first element of a plot. It introduces the setting, characters, and background information essential for understanding the story.
"The Open Window" is a short story written by the author Saki. The most important element in this story is irony.
A MacGuffin. It's a secret plot element that helps the plot move and captures the viewer's attention. It's sometimes forgotten by the end of the book/movie, though.
Plot
Plot