What do proteins carbohydrates and lipids have in common

C. They are all formed from the same elements.

Explanation:

Proteins, carbohydrates, and lipids are the biomolecules found in cells of living beings. Proteins are polymers of amino acids which have one central carbon atom to which amino group (NH3), carboxyl group (COOH), a hydrogen atom (H) and one side chain are bonded.  

Carbohydrates are the chemicals that also have C, H, and O in their structures.

Lipids are the derivatives of fatty acids which in turn are derived from hydrocarbons.

Hence, protein, carbohydrates, and lipids are formed of some common elements namely, C, H, and O.  

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