Question

the monomers (building blocks) of proteins are: fatty acids amino acids monosaccharides polysaccharides

Explanation:

Proteins are polymers made of amino - acid monomers. Other options are building blocks for different biomolecules. Fatty acids are part of lipids, monosaccharides are building blocks of carbohydrates, and polysaccharides are carbohydrate polymers.

Answer:

B. Amino acids