Step-by-step explanation:
Remember that the cell wall is composed of a network of cellulose microfibrils and cross-linking glycans embedded in a matrix of pectin polysaccharides. Therefore, the cell wall is made primarily of polysaccharides.
Now, remember that most of the energy required by the human body is provided by carbohydrates and lipids. Glucose is stored in the body as glycogen and this provides a ready source of energy. On the other hand, lipids primarily function as an energy reserve.
Thus, we can conclude that the correct answer is:
Answer:
Storing energy