What does a snaffle bit primarily use to communicate with the horse?

The snaffle bit primarily uses pressure on the mouth to communicate with the horse. This bit exerts varying degrees of pressure depending on how the reins are pulled or released, affecting the horse's lips, tongue, and the corners of its mouth. This direct communication is essential for guiding, stopping, and turning the horse, as the horse is highly sensitive to pressure in this area.

When the reins are pulled, the snaffle bit can create a gentle or firm pressure, prompting the horse to respond accordingly. The ability to communicate effectively through the mouth helps the rider establish a connection and understanding with the horse, allowing for better control and responsiveness during riding.

Other options suggest methods of communication that are either less direct or not standard when it comes to bits and their functions. Each of those alternative methods—pressure on the neck, back, or legs—may be part of the overall riding and training experience but do not pertain directly to the primary function of a snaffle bit.