Final answer:
The Second Industrial Revolution in the U.S. was fueled by natural resources, government support, entrepreneurship, and labor supply.
Explanation:
The "Second Industrial Revolution" in the United States was made possible by:
- Natural resources: The abundance of resources like vast mineral reserves and the development of technologies such as the transcontinental railroad.
- Government support: Policies that encouraged industrial growth and expansion.
- Entrepreneurship and labor supply: Visionary entrepreneurs like Andrew Carnegie and a growing labor force due to immigration.
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