Which of the following features indicates an extrusion process?

An extrusion process is characterized by the creation of long and thin forms from a material. This manufacturing technique involves forcing material through a die of the desired cross-section shape, resulting in continuous profiles like pipes, rods, or sheets. The key aspect here is that the material is shaped into a long form that maintains a consistent cross-section along its length.

The other features do not accurately represent the extrusion process. For instance, solid blocks typically refer to products created through processes like casting or molding, multiple layers are often associated with methods like laminating or layering materials, and distinct texture patterns are usually achieved through other techniques such as surface treatment or printing rather than extrusion itself.