The map of Boston shows the changes in the city's development over time because it furnishes the basis the city builds off of to enhance the lives of its citizens.
Why city development is important?
The development of the city is so important because it provides the foundation to build off the cities and to enhance the lives of its citizens.
It begins healthy, multifarious communities that are competent to entice and maintain talent, start and develop businesses, and crush problems that occur.
Citizens will be more comfortable, healthier, live longer lives, and richer. That is only the one reason that the map of Boston shows the changes in city development over time.
Therefore, option A is correct.
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