Answer:
<h2>A lot of hydrogen atoms, high pressure and high temperature.</h2>
Explanation:
The Sun generates energy using nuclear fusion, which is a reaction where two or more atomic nuclei are combained to form another atomic nuclei.
In this particular case, in the Sun, the energy is created by nuclear fusion of hydrogen. So, the scientific team would need a lot hydrogen atoms to from helium. Basically, the high pressure and high temperature in Sun's core makes Hydrogen nuclei to fuse, froming helium atoms.
So, basically, to recreate the energy-producing reactions inside the Sun, the scientific team would need a lot of hydrogen atoms, extremely high pressure and extremely high temperatures.
