Final answer:
The three main factory products that significantly changed the Piedmont's economy from agriculture to manufacturing were Textiles, Tobacco, and Iron, due to advances in technology during the Industrial Revolution.
Step-by-step explanation:
The three main factory products that changed the Piedmont's economy from agriculture to manufacturing were Textiles, Tobacco, and Iron. These industries were pivotal during the Industrial Revolution. The advent of machines such as the Spinning Jenny and the Spinning Mule transformed the textile industry by allowing quicker and cheaper production of cotton, worsted yarn, and flax. The production of iron also shifted significantly with the innovation of using coke from coal for smelting, which reduced costs and increased iron production. Tobacco processing became a prominent industry as well, contributing to the change in the Piedmont region's economic base from agricultural to industrial and manufacturing activities.
Textile manufacturing, in particular, positioned itself as the leading industry during the Industrial Revolution, with mechanized factories powered by water wheels or steam engines. The impact of steam power was widespread; it enhanced the productivity of textile mills, which provided fabric more efficiently and at better prices, contributing significantly to the urbanization and economic shift in various regions, including the Piedmont area.