Answer: RAILROADS
Explanation:
RAILROADS
Starting in the late 1820s, steam locomotives began to compete with horse-drawn locomotives. The railroads with steam locomotives offered a new mode of transportation that fascinated citizens, buoying their optimistic view of the possibilities of technological progress. The Mohawk and Hudson Railroad was the first to begin service with a steam locomotive. Its inaugural train ran in 1831 on a track outside Albany and covered twelve miles in twenty-five minutes. Soon it was traveling regularly between Albany and Schenectady.
Toward the middle of the century, railroad construction kicked into high gear, and eager investors quickly formed a number of railroad companies. As a railroad grid began to take shape, it stimulated a greater demand for coal, iron, and steel. Soon, both railroads and canals crisscrossed the states, providing a transportation infrastructure that fueled the growth of American commerce. Indeed, the transportation revolution led to development in the coal, iron, and steel industries, providing many Americans with new job opportunities.