What is a difference between starch and glycogen?
a.) starch stores energy, and glycogen provides structural support.
b.) starch is found in plants, and glycogen is found in animals.
c.) starch is composed of fructose, and glycogen is composed of glucose.
d.) starch is a monomer, and glycogen is a polymer.

The right answer is B.

Starch is, along with cellulose, the most common polysaccharide in the plant world. It constitutes the essential energy reserves of plants and is a component of the diet of humans. It is part of the group of slow sugars. Its consumption is particularly recommended to those who practice a sport.

Glycogen, which is a polysaccharide, is the form in which carbohydrates are stored in the body (animals and fungi). Glycogen is broken down into glucose molecules when the body needs energy.