Which process is primarily used to join pieces of fabric together in garment construction?

The process primarily used to join pieces of fabric together in garment construction is sewing. This technique involves using a needle and thread to stitch fabric pieces, creating seams that hold the garment together. Sewing allows for precise control over how pieces of fabric are assembled, enabling the creation of a variety of garment styles and constructions.

Coloring refers to the process of adding dye or other pigments to fabric, which does not involve joining fabric pieces. Weaving is a method of creating fabric by interlacing threads at right angles, while knitting involves interlocking loops of yarn to form a textile. Neither weaving nor knitting are processes utilized for connecting separate pieces of fabric in garment construction. Thus, sewing stands out as the essential technique for assembling garments.