Question

how is mass - energy equivalence demonstrated in the sun?
o hydrogen nuclei fuse to form a larger nucleus, and a small amount of mass is converted into energy.
o hydrogen nuclei fuse to form a larger nucleus by absorbing a large amount of energy and converting it into a small amount of mass.
o hydrogen nuclei form from smaller nuclei, and a small amount of mass is converted into energy.
o hydrogen nuclei form from smaller nuclei by absorbing a large amount of energy and converting it into a small amount of mass.

Explanation:

In the Sun, hydrogen - hydrogen fusion occurs. During this nuclear fusion process, hydrogen nuclei combine to form a larger nucleus (helium). According to Einstein's mass - energy equivalence ($E = mc^{2}$), a small amount of mass is converted into a large amount of energy.

Answer:

Hydrogen nuclei fuse to form a larger nucleus, and a small amount of mass is converted into energy.