"Carbon-based" refers to any substance or organism that primarily consists of carbon atoms. Carbon is a fundamental building block of life, forming the backbone of many biological molecules, such as proteins, carbohydrates, and fats. This unique ability to bond with various elements allows carbon to create complex structures essential for living organisms, including plants and animals. In the context of chemistry, carbon-based compounds are often called organic compounds. These include everything from simple molecules like methane to complex structures like DNA. The versatility of carbon makes it crucial for life on Earth, as it enables the formation of diverse and intricate biological systems.