Question

a polysaccharide is a type of polymer. polymers are molecules made of many—often hundreds or thousands—of repeating units called monomers. in polysaccharides, the monomers are simple sugars like glucose, fructose, or galactose. some polysaccharides have only one type of monomer, while other polysaccharides have two or more different types of monomers. select the polysaccharide.

Explanation:

A polysaccharide is a polymer of simple - sugar monomers. The first two structures show disaccharides (two - sugar units), while the third structure shows a long chain of sugar units, which is characteristic of a polysaccharide.

Answer:

The third structure is the polysaccharide.