The casting process is defined by which of the following methods?

The casting process is characterized by the method of pouring liquid metal into molds. This approach involves melting a metal down to its liquid state and then carefully pouring it into a pre-shaped mold, where it solidifies into the desired shape once it cools. This technique allows for the creation of complex shapes and forms that would be difficult or impossible to achieve through other manufacturing processes.

In contrast, shaping metal using rollers refers to processes such as rolling or forging, where the material is deformed through mechanical pressure rather than being cast. Heating metal until it glows relates more to processes like forging or welding, where the metal is manipulated while in a heated state. Finally, using electric charges to form shapes involves electroforming or other specialized techniques that do not align with the traditional casting definition. Therefore, the method of pouring liquid metal into molds distinctly represents the essence of casting in manufacturing.