Earth receives some of the Sun's energy in the form of heat and light.

What type of energy does heat and light from the Sun begin as?

A. nuclear

B. chemical

C. electrical

D. mechanical

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. During the fusion process, radiant energy is released.