According to the presentation, which of the following terms is commonly referred to as the horse's manners?

The term commonly referred to as the horse's manners is accurately identified with the quality of performance. In equine contexts, "manners" generally refers to how well a horse behaves during handling, riding, or competition. This encompasses aspects such as the horse's obedience, attitude, and overall demeanor in various situations, which are critical for successful performance.

The quality of performance, therefore, directly relates to the horse's ability to execute tasks or commands with composure and consistency, reflecting its training and socialization skills. Manners contribute significantly to this quality, as a well-mannered horse tends to be more responsive and cooperative, resulting in an overall better performance.

Other options like training, pace, and gait relate to different aspects of equine behavior and skills. Training involves the methods used to teach a horse, which may influence manners but does not define them directly. Pace refers to the speed at which a horse moves, while gait describes the way a horse walks, trots, canters, or gallops. None of these directly capture the essence of manners as effectively as the quality of performance does.