The plasma membrane's function is primarily supported by "pumps and gelatin-like material." The plasma membrane is composed of a lipid bilayer with embedded proteins, which includes pumps (such as ion pumps) that help transport substances across the membrane and contribute to cellular homeostasis. The "gelatin-like material" refers to the fluid nature of the membrane, which allows for the movement of proteins and lipids, facilitating various functions, including signaling and transport.
So, the correct response regarding what helps the plasma membrane function is "pumps and gelatin-like material."