Which of the following is crucial for maintaining horse performance?

Monitoring of overall well-being is crucial for maintaining horse performance because it encompasses a broad range of factors that affect a horse's health and abilities. This includes assessing their physical condition, nutrition, mental state, and management of any potential health issues.

A horse's performance can be significantly impacted by stress, illness, or injury, which are all aspects of their overall well-being. By regularly monitoring these elements, trainers can make informed decisions regarding training regimens, feeding programs, and rest periods to ensure that the horse is in peak condition for competition.

In contrast, while practices like regular grooming can contribute to a horse's appearance and certain aspects of health, they do not directly correlate with its performance levels in the same comprehensive way. Coat color is purely aesthetic and does not affect performance at all. Horse pedigree analysis is more related to genetic potential but does not ensure performance without the right management and monitoring of the horse’s well-being.