Can the middle of a city, with no undeveloped areas, be considered an ecosystem

Answer: yes, it can be considered as an ecosystem

Explanation:

An ecosystem is the interaction between the living (biotic) and non living (abiotic) component of an environment.

This living component consist of animals, organism, plants etc

The non living component include; climate, soil, mountain etc

With this definiton, we can deduct that the middle of a city with undeveloped area can be considered as an ecosystem