Which chemical elements are mentioned as being distributed back into the interstellar medium by the Cat's Eye Nebula?

Answer

Carbon, nitrogen, and oxygen

As the nebula dissipates, it releases enriched chemical elements that were forged during the star's nuclear life. Specifically, elements such as carbon, nitrogen, and oxygen are deposited into the interstellar medium. This redistribution of heavy elements is a vital process in galactic evolution, as these materials become the building blocks for new stars and planetary systems.

Which chemical elements are mentioned as being distributed back into the interstellar medium by the Cat's Eye Nebula?
evolutionastronomystarnebulacat's eye