Which of the following was an effect of the growth of the service industry in the late 1800s?
the number of people that worked in factories decreased.

the number of people that worked in factories increased.

the urban middle class grew. the urban middle class shrank.

The urban middle class grew.

Explanation:

The Industrial Revolution causes profound changes in the cities, especially in the factories. The demographic growth and the concentration of large masses of population quickly turn them into macrocities. There were not, however, good urban responses, prevailing in the layout of cities purely speculative reasons: utilitarianism and production reasons.

The architecture of the 19th century finds a stimulus and also, sometimes, a brake on the development of cities in a series of historical transformations. The first phenomenon to consider is the general increase in the population that was due to the decrease in mortality and the increase in production. Another reality to consider is that industrial cities tend to hoard most of that population, absorbing abundant labor from rural areas. The organization of work forces the concentration of abundant families at certain points while other areas are depopulated.