Answer:
The correct answer is option A. "hydrogen atoms".
Explanation:
The energy producing reactions that occur in the sun take place by a process known as nuclear fusion or the proton-proton chain. Basically, tons of atoms of hydrogen are being converted into helium, which releases heat and energy. If a scientific team is trying to re-create the nuclear fusion of the sun they would only need hydrogen atoms, since the fusion of the hydrogen atoms is the reaction that produces helium atoms, heat and energy. However, the scientist team must recreate the tremendous gravitational forces of the sun to produce the nuclear fusion of hydrogen.
