Answer:
Expansion of the railroad was essential during the 1800 century since it helped in booming the U.S economy.
Step-by-step explanation:
The railroads first created a high demand for goods as well as labor. While the railroads were being constructed, many people participated in building them. They required a high amount of steel for rolling and rails. Therefore the demand for rails increased the US economy.
Further railroads created a vast market. Before the rails were expanded, it was difficult to move goods from place to place. Thus the western part of the states was not worth of any economy since it was difficult to transport goods. As a result of railroads, they can now produce high quantities of their goods since it is easier to transport.