Question: How does the negative slope of the solid-liquid equilibrium line in the phase diagram of water contribute to the movement of glaciers? Need Assignment Help? Select one: a. It allows ice to convert directly to vapor, causing glaciers to sublimate. b. It results in ice remaining solid under pressure, preventing glacier movement. c. It enables ice to become a supercritical fluid, facilitating glacier flow. d. It means that ice melts at lower temperatures under increased pressure, creating a layer of water that lubricates glacier movement.