Answer:
"Tattle"
Step-by-step explanation:
If you tattle it means you are trying to get somebody in trouble by pointing out their wrongs. "Vickie tattled on her little brother Mark."
"Say" doesn't have any negative connotation. It is just a neutral word meaning "to speak."
If you express something you are just explaining or showing how you feel about something and it could be bad or good, but not specifically one or the other.
And if you indicate something, you are pointing it out or showing it. Once again, you could indicate something that is bad or good.
So tattle is the only one that is explicitly seen as having a "bad" connotation.
Hope this helps!!!