Which of these allows you to control the speed at which the machine sews? bobbin foot pedal needle thread guide

The correct answer is the foot pedal. The foot pedal allows you to control the speed at which the machine sews. By pressing down harder on the foot pedal, you can make the machine sew faster, and by pressing down softer or lifting the foot off the pedal, you can slow down the sewing speed. The other options, such as the bobbin, needle, and thread guide, are important components of a sewing machine, but they do not control the sewing speed.