Which process would be used to create a product by forcing molten material into shapes?

The process used to create a product by forcing molten material into shapes is known as casting. This technique involves pouring molten metal or other materials into a mold where it solidifies, allowing for the creation of complex shapes and designs that would be difficult or impossible to achieve through other methods.

Casting is particularly advantageous when producing large quantities of parts, as it can replicate intricate features with high levels of repeatability. It is commonly used in manufacturing industries for making items such as engine blocks, decorative items, and various mechanical components.

In contrast, the other processes listed serve different functions. Welding involves joining materials, typically metals, by melting parts of them together, which does not create a shape from molten material. Forging refers to shaping metal through compressive forces, usually at high temperatures, but this is not about pouring molten material into a mold. Assembly is the process of putting together components or parts to form a complete product, which does not involve any material changing states from liquid to solid.