What part of a sewing machine holds the bobbin?

The bobbin case is an essential component of a sewing machine that securely holds the bobbin in place during the sewing process. The bobbin is a small spool that contains the lower thread, and the bobbin case is designed to ensure that the bobbin can rotate freely while providing the necessary tension for the thread as it passes through the machine. Proper function of the bobbin case is crucial for achieving consistent and even stitching, making it a vital part of the sewing mechanism.

The bobbin cover, while it plays a role in protecting the bobbin and allowing access to it, does not hold the bobbin itself. The needle plate serves as the surface upon which the fabric is positioned during sewing, and the stitch selector is used to choose different stitch patterns or types, but neither of these components directly involves holding the bobbin. Thus, the bobbin case is accurately identified as the correct answer.