Question

which elements can be made in the core of a star after the hydrogen is used as fuel? select four answers. iron gold silicon carbon oxygen hydrogen

Explanation:

After hydrogen fusion (H→He), stars fuse heavier elements. Carbon, oxygen, silicon, and iron form in stellar cores (gold forms in supernova/neutron star collisions, H is fuel, not post - H fusion product here).

Answer:

carbon, oxygen, silicon, iron