Final answer:
The main business in the North by the mid-1800s was industry, particularly the railroad industry. Farming was also significant but did not overshadow industrial growth.
Step-by-step explanation:
The main business in the North by the mid-1800s was industry. The North had undergone a significant transformation and emerged as a major industrial region, fueled by advancements in technology and the rise of factories.
One key industry was the railroad industry. Railroads played a crucial role in promoting economic growth, facilitating transportation, and connecting different regions. They became a symbol of progress and expansion.
While farming was still an important economic activity in certain parts of the North, it was the growing industrial sector that dominated the economic landscape.
Learn more about The main business in the North during the mid-1800s