Answer: when all the sentences are joined by transitions
Explanation: A paragraph is unified when when all the sentences are joined by transitions.
They were used to deliver messages. Apparently, they had spy birds. Even today. Which I think is kinda wrong...
They also symbolize freedom and diversity. Also, secrecy.
I hoped this helped.
I’m not sure what you’re asking here but I would say that “untainted” usually means authentic, not untalented.
I believe it’s prewriting! I hope this helped!