What does it mean to "ease" fabric?

Easing fabric refers to the technique of gathering it slightly so that it can fit smoothly into curves or along design lines without creating bulk. This method is especially useful in garment construction when dealing with pieces that need to blend seamlessly at curves or transitions, such as armholes or neckline contours. Easing helps to create a more professional and polished appearance in finished items by allowing the fabric to contour naturally to the shape of the body or design without puckering, which can happen if the fabric is not manipulated correctly. This technique adds to the garment's comfort and fit, making it an essential skill in sewing. The other options provided describe different sewing techniques and concepts that do not align with the specific definition of easing.