Answer
b. chitin
Work Step by Step
Chitin is a polysaccharide, meaning it is made up of chains of simple sugars called monosaccharides. This compound is the main component of the tough outer shell of insects called the exoskeleton; chitin also is found in the walls of fungal cells.
Cellulose is a polysaccharide found in plants. Cholesterol and phospholipids are found in the membranes of animal cells.
