Where does most of the energy on planet Earth come from?

solar energy, gravity, radioactive decay, and the rotation of the Earth.

Explanation:

Much of Earth's energy comes from the Sun.

Explanation:

Nearly all life on Earth depends on solar energy since plants use sunlight to make food through the process of photosynthesis. Photosynthesis was the process that fed plants and animals, which in turn, over the course of millions of years, became fossil fuels.