The most likely reason would be that this city has either been expanding and with that effectively decreasing the amount of available living spcace the animals and trees as well have, at the same time it is possible that this city has been emiting increased amounts of the different types of pollution - one example being light polution which can strongly influence certain ecological niches.
Answer:
The advantages of civilization are listed below:
1) Safety
2) Technological advancement
3) Cultural advancement
4) Emergence of concept of trade and commerce
Explanation:
I tried my best
C.dictatorship hope this helps