Which of the following accurately describes carbon atoms?
a. carbon atoms can bond to other carbon atoms.
b. carbon atoms can only form triple bonds with other carbon atoms.
c. carbon atoms are only found in two of the four main macromolecules.
d. carbon atoms only have three electrons available for bonding.

Carbon is the sixth most abundant element in the planet. Without carbon, life will be non-existent. It provides the framework for all living organisms on Earth. A carbon atom is composed of six protons and six neutrons. Carbon is found in almost everything that surrounds us; they are in fuels, coals, natural gas, even the proteins that make-up hair and meat contain carbon. This is mainly because carbon atoms can bond to other carbon atoms to make a compound. It is naturally found in the environment and its abundance fits its purpose in our existence.