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

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

answer; the mayans and

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.