It’s a fragment because it cannot stand on its own and is a part/fragment of a sentence. Hope this helps!
Exposition is setting the back round of a story before the story starts.
<span>Casca does not like the populace. He calls them stinking and dirty and other insulting things. The irony is in the essential role that the populace must play in any revolt once the tyrant has been deposed </span>
Answer:
be done to protect people walking on sidewalks
