12.) By linking northern industries with western farms and s…
12.) By linking northern industries with western farms and southern plantations, new innovations in American infrastructure and transportation fueled the creation of a _____________ in America, which enabled manufacturing goods to become more efficient and increasingly accessible throughout the country as well as innovations in industry, agriculture, and communication, that increased efficiency and overall productivity drastically. These changes created cycles of boom and bust within the economy, fostered urbanization, reinforced national economic growth, and fostered innovation, as well as also leading to social upheaval and changing class dynamics within the nation.