Using a pattern or template when cutting fabric provides multiple benefits simultaneously, which is why the correct answer encompasses all three individual advantages listed.
Improved accuracy: A pattern provides precise outlines of each piece needed, ensuring that shapes, curves, notches, and grain lines are cut correctly every time. Without a pattern, freehand cutting is prone to errors in shape and size.
Reduced fabric waste: Patterns allow the cutter to plan a layout (known as a cutting layout) that positions all pieces on the fabric to use the material as efficiently as possible. Strategic placement minimises the amount of unused fabric between pieces.
Increased speed: Once a pattern is placed on the fabric, the cutter simply follows the outline rather than measuring and marking each dimension individually. This significantly speeds up the cutting process, especially when making multiple garments of the same design.
Since a pattern or template genuinely delivers all three of these benefits, the most complete and accurate answer is the one that includes all of them rather than selecting only one advantage in isolation.