Carbon is known as the "building block of life." This designation arises from carbon's unique ability to form stable bonds with various elements, including itself, allowing it to create complex molecules necessary for life. Carbon forms the backbone of biological macromolecules, such as proteins, nucleic acids, carbohydrates, and lipids, which are essential for cellular structure and function. The versatility of carbon compounds underlies the diversity of biochemical processes that sustain living organisms. Its fundamental role in chemistry and biology makes carbon central to discussions about life on Earth and the search for life elsewhere in the universe.