How are elements created in stars?

Answer 1

Stars are made of hydrogen. Heat and nuclear forces causes bonding between atoms of hydrogen and create heavier elements.

Answer 2

Elements up to iron can be fused in the cores of massive stars. Heavier elements are produced in a supernova explosion when the star runs out of fuel.

Answer 3

via the star blowing up - supernova - everything except hydrogen and helium has been created by supernovi