Answer:
The creation of a national railroad system in European countries and the United States was crucial in the spread of the Industrial Revolution because it allowed the interconnection of the different productive points of the nations, joining together cities with different productive characteristics, allowing industrial cities to They will be supplied with raw materials through their transfer by railroad, and also allowing the transport of manufactured products through the national territory, facilitating their consumption. Likewise, the trains facilitated rapid population displacement, which made internal migration from the fields to the cities accessible, to reinforce the labor force in industries located in urban centers.