Here's why:

* Carbon's Bonding Ability: Carbon has four valence electrons, meaning it can form four covalent bonds with other atoms. This allows carbon to create long chains, branched structures, and rings, providing the backbone for complex organic molecules.

* Carbon-Carbon Bonds: Carbon can form strong single, double, and triple bonds with other carbon atoms. This allows for the formation of diverse and intricate structures.

* Versatility: Carbon can bond with a wide variety of other atoms, including hydrogen, oxygen, nitrogen, sulfur, phosphorus, and halogens. This versatility gives rise to the enormous diversity of organic molecules.

In summary, the unique bonding properties of carbon make it the foundation for the framework of all organic molecules.