Answer:
animals
plants
Step-by-step explanation:
Polysaccharides are complex organic sugars formed from simple sugars called monosaccharides.
Human beings can digest the polasaccharides found in many plants and animals without qualms.
However, human beings lack the enzymes required for the digestion of plant fibers. As such human beings can not digest plant fibers. The excrete them out in feces.
Thus the polysaccharide that can not be digested by people are plant fibers.