Final answer:
The railroad and steel industries were interdependent during the 19th century. They helped other industries grow and impacted the organization of big business.
Step-by-step explanation:
The railroad and steel industries were interdependent during the 19th century because the railroad industry heavily relied on steel for the construction of tracks, locomotives, and train cars. In turn, the expansion of the railroad industry helped the steel industry grow by creating a constant demand for steel.One way that the expansion of the railroad and steel industries helped other industries to grow was by providing a reliable and efficient mode of transportation. This allowed for the transportation of raw materials to industrial factories and the distribution of finished goods to consumer markets.The expansion of the railroad and steel industries impacted the organization of big business in the United States during the 19th century in two ways. Firstly, it led to the formation of large corporations, such as the Standard Oil Company and the Carnegie Steel Company, which dominated their respective industries. Secondly, it prompted mergers and consolidation as smaller companies trended towards joining forces to form larger, more powerful entities.