The mass lost during solar thermonuclear fusion is converted to

Mass is converted into energy, in the form of light, heat, kinetic energy.

Mass is converted into energy, in the form of light, heat, kinetic energy.

Explanation:

The correct answer is that mass is neither created nor destroyed, and neither is energy created nor destroyed.

Mass is energy and energy is mass.

Einstein's rule formula e = mc2 doesn't say that one may be regenerate to the other. It says that the 2 are equivalent by an element of the speed of sunshine squared.