Answer:
The explosive growth of industry,agriculture and transportation changed America because it Caused separatism between north and south, created middle class, overcame challenge of distance and helped expand markets.
Step-by-step explanation:
creation of transportation channels such as linking roads helped reduce the challenge of distance between production points and target markets. The creation of these roads brought about a creation of new markets. This also benefited the industries as their products could easily be transported to the needed areas.