Final answer:
Carbon's unique combination of size and bonding properties make it the focal point of organic compounds. These properties allow carbon atoms to form long chains or skeletons, resulting in a wide variety of compounds. By forming stable covalent bonds, carbon provides unparalleled complexity to organic chemistry.
Step-by-step explanation:
The properties of carbon that make it the focal point of organic compounds are its unique combination of size and bonding properties. Carbon atoms can bind together in large numbers, forming long chains or carbon skeletons. These chains can be straight, branched, or ring-shaped, allowing for a huge variety of compounds. Carbon's ability to form stable covalent bonds with other elements, including itself, enables it to create an unparalleled complexity of molecules.