Answer:
American economic system is the shift from an agrarian-based economy to an industrialized one.
Step-by-step explanation:
One of the most important developments that has transformed the American economic system is the shift from an agrarian-based economy to an industrialized one. This transformation, which took place during the late 19th and early 20th centuries, led to increased productivity and economic growth, as well as the development of new industries, such as steel, oil, and automobiles. The rise of large corporations and the growth of the service sector also played a significant role in this transformation. Additionally, the emergence of the United States as a major player in the global economy and the adoption of free-market economic policies have also had a significant impact on the American economic system.