Copper, carbon, and oxygen are all elements, meaning they are the simplest forms of matter and cannot be broken down into simpler substances. They are created in the hearts of stars! Here's a breakdown:

* Copper: Formed in the cores of massive stars that undergo supernova explosions. These explosions release enormous amounts of energy, fusing lighter elements into heavier ones, including copper.

* Carbon: Created in the cores of stars through nuclear fusion. Hydrogen atoms fuse to form helium, and then further fusion reactions create carbon.

* Oxygen: Also formed through nuclear fusion in stars, primarily through the fusion of helium atoms.

So, while these elements exist in the Earth and in our bodies, they were originally forged in the immense heat and pressure of stars billions of years ago.