Final answer:
In sheet-metal bending operations, embossing and blanking are the correct processes. The other processes listed are not related to bending of sheet metal.
Step-by-step explanation:
The variations of sheet-metal-bending operations include embossing and blanking. Embossing is a process that creates a raised or recessed design on sheet metal. Blanking is a fabricating process where a punch and die are used to cut out a piece, called a blank, from a larger piece of sheet metal. Neither forging and casting, extrusion and drawing, nor thermoforming and injection moldings are considered sheet-metal-bending operations.