<span>an instruction written into the script of a play, indicating stage actions, movements of performers, or production requirements. That is the answer </span>
Imagery is when you describe something visually with words. In this sentence, "sharp hiss" is imagery because it makes you think of what is happening like an image.
It would be passive because if you evaluate the author and determine what the knowledge of the top are it would be passive i also know because we just did this like two weeks ago.