What are the three major functions of carbohydrates?

CARBOHYDRATES HAVE THREE MAIN FUNCTIONS :

They serve as an important source of energy. For example, glucose is brokendown in a step-wise fashion to release energy when required.

They serve as substancesin which energy is stored. For example, if a living organism has more energy than it needs for its immediate use, then it stores this extra energy in polysaccharides such as starch (in plants) and glycogen (in animals).

They supply cells with materials needed to build cell structures. For example, cellulose is used to make cell walls.