Answer: Cellulose
Increased strength to the cell
Explanation: Cell wall is the outer protective layer of cell. It found outside the cell membrane. Cell wall is mainly composed of cellulose , hemicellulose , pectin and proteins .
Cell wall found in plants, fungi , archaea and in bacteria. But it is not same in all organisms. It varies in all as bacterial cell wall is made up of peptidoglycan whereas plants cell wall composed of cellulose.
Cell wall increase strength to the cell by protecting cell from damage , by giving cell support and by giving it structure.