Question

How does the Sun release nuclear energy?

through the fusion of a uranium nucleus into smaller nuclei
through the fusion of hydrogen nuclei into a heavier nucleus
through the fission of a uranium nucleus into smaller nuclei
through the fission of hydrogen nuclei into a heavier nucleus

Answer 1

through the fusion of hydrogen nuclei into a heavier nucleus 

Answer 2

Answer: (B) through the fusion of hydrogen nuclei into a heavier nucleus.

Explanation:- Because of the intense temperature and pressure on the surface of the sun, nuclear fusion takes place. Hydrogen nuclei fuse together to generate helium producing heat and light energy alongside.

The fusion thus produces large amount of heat energy which is radiated out from the sun outside.

`_1^2\textrm{H}+_1^2\textrm{H}\rightarrow _2^4\textrm{He}+energy`