The right answer is D). Water
Proteins are amino acids that contain carbon atoms.
Carbohydrates contain carbon atoms, hence the suffix "carbo".
Lipids are rich in carbon atoms.
Water is an important biological constituent, and liquid water is essential for all known living organisms. Given its vital nature, its importance in the economy and its unequal distribution on Earth, water is a natural resource whose management is subject to strong geopolitical issues.
