Question

All of the elements heavier than oxygen are created by fusion reactions in _____.

Answer 1

All of the elements heavier than oxygen are created by fusion reactions in red supergiants and supernovas.

Red supergiants are aging giant stars that has consumed its core's supply of hydrogen fuel.

Answer 2

The best answer to the question above would be the first choice, red supergiants, and supernovas. All of the elements that are heavier than oxygen are created by the fusion reactions in red supergiants and supernovas.