Alternative energy sources are those that do not deplete natural resources and do not harm the environment.
Options A, B, and C are all fossil fuels, which we know can be depleted and harm the environment.
The only valid option here is D, Geothermal energy.
Geothermal energy is both renewable and environmentally friendly.
I would say D)Winds, because the moon causes tides, and the earth doesn't cause moon phases, the sun does when it hits the moon a certain way, hope this helps (:
The earth is cooled and its atmosphere is heated by terrestrial radiation.
