Final answer:
In a community, neighborhoods can be compared to cells, communities within a city can be compared to tissues, the city itself can be compared to an organ, and the entire metropolitan area can be compared to a multicellular organism.
Step-by-step explanation:
In a community, neighborhoods can be compared to cells because they are the basic units that make up a community. Communities within a city can be compared to tissues because they are groups of similar neighborhoods working together. The city itself can be compared to an organ because it functions as a whole and has a specific purpose. Finally, the entire metropolitan area can be compared to a multicellular organism because it is made up of different organs, or cities, working together to support the overall functioning of the area.