What is the purpose of a tie-off knot in stitching?

A tie-off knot in stitching serves a specific purpose related to securing the end of the stitching process. The correct choice indicates that a tie-off knot is a standard modified seine knot used for this function on all stitches except the starting stitch. This type of knot is designed to hold the stitches firmly in place after they have been completed, ensuring that they do not come undone over time.

By using a standardized knot, it simplifies the process for those who sew, providing consistency and reliability in the integrity of the stitching. The knot effectively secures the end of the thread, preventing unraveling and maintaining the quality of the fabric work.

In contrast, the other options address different aspects related to stitching but do not accurately describe the primary purpose of a tie-off knot. For instance, while preventing fabric from fraying is important, it is not the main function of a tie-off knot. Creating additional tension in the stitch pertains more to the technique of stitching itself than to securing it. Lastly, although ease of removing stitches is a consideration in sewing, it does not align with the primary role of a tie-off knot, which focuses on securement rather than removal convenience.