Which bit is characterized by a combination of a snaffle and a curb action?

The Kimblewick bit is indeed characterized by a combination of snaffle and curb action. It has a unique design that includes a single joint or double joint in the mouthpiece, similar to a snaffle, which provides a mild level of control and comfort to the horse. However, it also features a cheek piece that allows for some leverage, making it effective in providing curb action when needed. This dual functionality is beneficial for riders who want to maintain light contact but still need additional control in certain situations, such as during faster paces or for more experienced horses.

The combination of actions in the Kimblewick makes it versatile, enabling it to be used for various disciplines, including jumping and general riding. Its design allows for more effective communication with the horse, making it a preferred choice for those who seek a balance between a softer snaffle action and more authoritative curb action when required.

In contrast, other bits listed do not have this specific functional combination. For instance, the "curbed snaffle" doesn't provide the dual actions as effectively as a Kimblewick, while the "Pelham" does have a combination of snaffle and curb actions, but it utilizes two reins and operates differently in the rider's hands.