Which technique involves using heat, moisture, and pressure to create fabric instead of traditional weaving?

Felting is the correct choice because it refers to a technique that uses heat, moisture, and pressure to entangle fibers, thereby forming a dense, non-woven fabric. This method is distinct from traditional weaving, which interlaces individual threads at right angles to create fabric. In felting, the process can create materials from fibers like wool, where the scales on the fibers open up under heat and moisture, allowing them to mat together when agitated under pressure.

Other techniques mentioned, such as knotting, knitting, and spinning, focus on manipulating yarns or threads into shapes or fabrics, but they still rely on weaving or interlocking processes rather than the unique fabric creation method that felting employs. Knotting involves tying fibers together, knitting involves creating a fabric using interconnected loops, and spinning is the process of turning fibers into yarn. These methods do not share the same characteristics or results as felting.