Which best describes the main sources of energy in the united states?
a. wind, nuclear, natural gas
b. solar, wind, hydroelectric
c. geothermal, biomass, solar
d. coal, oil, natural gas

D

Explanation:

Most of the energy in the United States comes from the burning of fossil fuels (coal, oil, natural gas). Hope this helps!

D. Coal,oil,natural gas

Explanation:

The main sources of energy in USA are non renewable sources of energy like coal, oil and natural gas. Oil is the main source of energy in USA while coal stands second as a source of energy. Apart from these two, natural gas is also widely used  in USA as an energy source. Non renewable sources of energy are also known as conventional sources of energy. Alternate sources of energy which are also known as renewable sources of energy like wind, solar hydroelectric, geothermal energy etc. are not used commonly as main sources of energy in USA.

i think the miocene epoch spans the time from 23 million to 12 million years ago.