Metals is the correct answer.
Carbon forms the basis of all the following: fats, nucleic acids, and sugar. However, metals are not formed from carbon.
Carbon is a chemical element that is the building block of all known life on Earth. It is a highly versatile element that can form a wide variety of compounds, including fats, nucleic acids, and sugars. Fats and oils are composed of long chains of carbon atoms bonded to hydrogen atoms, and they are important sources of energy for living organisms. Nucleic acids are complex molecules that carry the genetic information for living organisms, and they are made up of long chains of nucleotides, which are composed of carbon, hydrogen, oxygen, and nitrogen atoms. Sugars are simple carbohydrates that are composed of carbon, hydrogen, and oxygen atoms, and they are important sources of energy for living organisms.
Metals, on the other hand, are a class of chemical elements that are characterized by their ability to conduct electricity and heat, and they are not composed of carbon. Some examples of metals include copper, gold, iron, and silver.