Answer:
D) Cell walls of plant cells give plants their rigid shapes, while lack of cell walls allows for mobility in animals.
Step-by-step explanation:
The cell wall of plant cells is external to the plasma membrane and is composed mainly of cellulose, hemicellulose and pectin. Cellulose, which is formed exclusively by glucose molecule bonds, is the main component of cell walls and is responsible for ensuring its architecture. Cell wall provides stiffness and structural support to the plant cell.
Animal cells do not have a cell wall, so they do not have this rigidity and are malleable in different shapes and sizes, allowing the mobility of the organisms that have it.