4: when the neighbor saw this.
it LOOKS like a complete sentence but singling out the fragment by itself you can see it looks funny because it’s unfinished!
        
             
        
        
        
Yes Infatuation is an abstract noun. hope this helps.
        
                    
             
        
        
        
D.) exposition. The exposition introduces the characters, setting, plot, prior events, etc.
        
             
        
        
        
I think she will be ruled In all respects by me; nay, more, I doudt it not.