Final answer:
During 1865-1900, city dwellers faced various urban problems, but a lack of open space for parks was not one of them.
Step-by-step explanation:
In the period from 1865 to 1900, city dwellers faced numerous problems associated with urbanization. However, the urban problem that was NOT present during this time was a lack of open space for parks. This period witnessed the establishment of several public parks and green spaces in cities, such as New York City's Central Park in 1857.
Learn more about Urban problems in the late 19th century