What is the purpose of a bridle and reins?

The purpose of a bridle and reins is primarily to direct the horse and communicate with it during riding. The bridle consists of various parts, including the headstall, bit, and reins, which work together to allow the rider to exert control over the horse's movements. When the rider applies pressure to the reins, it communicates specific signals to the horse, enabling the rider to guide, slow down, or stop the horse. This communication is critical for safe and effective riding, as it helps the rider establish a connection with the horse and respond to its actions and reactions.

In contrast, the other options do not accurately represent the main function of a bridle and reins. Keeping the horse warm pertains more to blankets or other protective gear, while decorative appearance is only a secondary aspect and not the primary purpose. Connecting the horse to the saddle refers to the girth and other tack components, which serve a different function than that of the bridle and reins.