The correct answer is
B) Covalent Bonds.
Step-by-step explanation:
A chemical reaction bonding monomers commonly to make a polymer is called polymerization. Some polymers are physical and created by organisms. Proteins have polypeptide molecules, which are natural polymers made from various amino acid monomer units. A particular polymer molecule may consist of hundreds to a million monomers and may have a linear, branched, or network structure. Covalent bonds hold the atoms in the polymer molecules together and formed bonds then hold groups of polymer chains collectively to form the polymeric material.