The correct answer is: C. 40%
Oil, coal, and natural gas are the three main fossil fuels. They are non-renewable energy sources that are formed from the remains of ancient plants and animals. Fossil fuels are a major source of energy in the United States, accounting for about 40% of the total energy used in the country.
Oil is a liquid fossil fuel that is found in underground reservoirs. It is used to produce gasoline, diesel fuel, and other petroleum products. Coal is a solid fossil fuel that is formed from the remains of ancient plants. It is used to generate electricity and to produce steel. Natural gas is a gaseous fossil fuel that is formed from the remains of ancient plants and animals. It is used to generate electricity, to heat homes and businesses, and to power vehicles.
Fossil fuels are a major source of energy in the United States, but they are also a major source of pollution. Burning fossil fuels releases carbon dioxide into the atmosphere, which contributes to climate change. Fossil fuels are also non-renewable, which means that they will eventually run out.
The United States is working to reduce its reliance on fossil fuels and to increase its use of renewable energy sources, such as solar and wind power. However, fossil fuels are likely to remain a major source of energy in the United States for many years to come.
Here is a brief explanation of each option:
- Option A: 10%. This is incorrect because oil, coal, and natural gas supply approximately 40% of the energy used in the United States.
- Option B: 25%. This is incorrect because oil, coal, and natural gas supply approximately 40% of the energy used in the United States.
- Option C: 40%. This is the correct answer because oil, coal, and natural gas supply approximately 40% of the energy used in the United States.
- Option D: 81%. This is incorrect because oil, coal, and natural gas supply approximately 40% of the energy used in the United States.