Earthquakes happen due to tectonic plate motion
<span>Proteins are composed of α-amino acids linked together by peptide bonds into polypeptide chains. An amino acid is characterized by an amino group (-NH2) and a carboxylic acid group (-COOH) linked to a carbon, known as the α-carbon. Also attached to the α-carbon is a H and various R-groups or "side-chains".</span>
the answer on the picture is C, so the answer of the multiple choice questions is A.
