Final answer:
U.S. infrastructure relies heavily on fossil fuels and foreign capital, with oil being a key resource for transportation and economic growth.
Step-by-step explanation:
Most of the U.S. infrastructure today is dependent on two primary things: fossil fuels, particularly oil, and foreign capital investment. The infrastructure includes fundamental components such as roads, water systems, and schools.
Transport infrastructure like roadways and public infrastructure systems are crucial for the operation of society and economy. Over two-thirds of oil consumption is used for transportation, fueling cars, trucks, trains, and airplanes.
Much of this demand for oil ties back to the United States' reliance on imported oil, which impacts not only energy security but also has significant economic implications, as it involves substantial expenditure that could otherwise support domestic economic growth.