USA HISTORY

Detailed explanation-1: -A synergy between iron and steel, railroads and coal developed at the beginning of the Second Industrial Revolution. Railroads allowed cheap transportation of materials and products, which in turn led to cheap rails to build more roads. Railroads also benefited from cheap coal for their steam locomotives.

Detailed explanation-2: -A surge of technological innovations and inventions, like Thomas Edison’s incandescent lightbulb and Alexander Graham Bell’s telephone, fueled this economic growth. The economic boom made the rich richer and the poor poorer, widening the already large economic gap between the two groups.

Detailed explanation-3: -Railroads became a major industry, stimulating other heavy industries such as iron and steel production. These advances in travel and transport helped drive settlement in the western regions of North America and were integral to the nation’s industrialization.

Detailed explanation-4: -The railroads were the key to economic growth in the second half of the nineteenth century. Besides making it possible to ship agricultural and manufactured goods throughout the country cheaply and efficiently, they directly contributed to the development of other industries.