Which class features horses shown in a group setting?

The class that features horses shown in a group setting is Western Pleasure. In this type of competition, multiple horses are shown together in a ring, allowing them to demonstrate their natural movement, gait, and suitability for riding while being judged for their performance and demeanor in a more relaxed environment.

Western Pleasure classes emphasize the horse's ability to maintain a smooth, easy-going manner that reflects the type of horse used for leisurely riding. This setting allows judges to assess how well horses interact with each other and how they respond to the rider in the presence of other equines.

In contrast, other options involve different formats: Hunter Under Saddle often also incorporates group settings but focuses more on the horse's suitability for jumping; Reining features fast-paced maneuvers and is usually done individually; and Dressage involves highly precise movements and patterns that horses execute separately. Therefore, the defining characteristic of Western Pleasure is its group format, which allows for a more comprehensive evaluation of horses in a communal riding environment.