Read this passage from "The Tell-Tale Heart": I thought the heart must burst. And now a new anxiety
seized me – the sound would be heard by a neighbour!
The old man's hour had come! With a loud yell, I threw
open the lantern and leaped into the room. He shrieked
once - once only. In an instant I dragged him to the floor,
and pulled the heavy bed over him. I then smiled gaily, to
find the deed so far done. But, for many minutes, the heart
beat on with a muffled sound. This, however, did not vex
me; it would not be heard through the wall. At length it
ceased. The old man was dead.
What structural element is affected by Poe's use of both long and short
sentences in the passage?