A. Cell Wall
The cell wall shares a similar function with the skeletal system. Both provide structural support and help maintain the shape of the cell or organism. The cell wall is a rigid outer layer found in plant cells and some other organisms, providing support and protection, akin to how the skeletal system supports and protects the body in animals. The other organelles listed (Chloroplast, Cell Membrane, Mitochondria) have different functions in the cell.