remorseful is your best answer 
"remorseful" means "filled with remorse, sorry". Even though it is not said, it is implied that he is sorry, because he thinks back to the history of how his mom ended up like that.
hope this helps
 
        
                    
             
        
        
        
Answer:
which question dude can you please clear
 
        
             
        
        
        
<span>"The Black Cat" is actually a short story that was written by the author Edgar Allan Poe. This story is related to the psychology of guilt and therefore, the tone that he uses the word "succumbed" here is Annoyance. The answer to this would be the first option. hope this helps.</span>