Final answer:
The true statement is that monomers combine to make polymers. Polymerization is the process where small monomer units link together to form larger polymer chains, occurring via reactions such as dehydration synthesis. Therefore, the correct option is B
Step-by-step explanation:
The statement that is true among the provided options is: b. Monomers combine to make polymers.
Monomers are small molecules which combine with each other using covalent bonds to form larger molecules known as polymers. This process is called polymerization. Polymers are giant molecules that consist of long chains of repeating monomer units connected by covalent bonds. Examples of biological polymers include proteins, starch, cellulose, DNA, and RNA. The synthesis of polymers from monomers can occur via reactions such as dehydration synthesis (release of water) or condensation reactions, and polymers can be broken down back to monomers through hydrolysis.