Final answer:
The development of resorts in North America coincided with the development of the railroad due to easier travel, stimulation of related industries, and government involvement.
Step-by-step explanation:
In North America, the development of resorts coincided with the development of the railroad for several reasons. Firstly, rail travel made it easier for individuals to travel to various destinations, including resorts, as it provided a faster and more convenient mode of transportation. Secondly, the expansion of railroads stimulated growth in industries such as iron, wood, coal, and others, leading to an increase in resort construction. Lastly, governments played a role in promoting the construction of railroads and resorts, as they recognized the economic benefits and potential unity brought by these developments.