Final answer:
During the Second Industrial Revolution, the North saw the development of mechanized manufacturing, the South focused on large agricultural plantations supported by slave labor, and the West experienced the construction of railroads.
Step-by-step explanation:
In the North, one event during the Second Industrial Revolution was the development of mechanized manufacturing in New England. This was caused by advancements in technology and the availability of resources. The effects of this event included increased production of goods for a nationwide market and a shift from home production to factory production.
In the South, a major event was the focus on large agricultural plantations supported by slave labor. This was influenced by the region's fertile land and climate suitable for growing crops such as cotton and tobacco. The effects of this event included the expansion of the cotton industry and increased reliance on slave labor.
In the West, the construction of railroads was a significant event. This was facilitated by the need for transportation to connect the expanding frontier to the rest of the country. The effects of this event included the accelerated expansion of the United States, the displacement of Native American populations, and the development of new industries along the railroad routes.