What characterizes a bald facial marking in horses?

A bald facial marking in horses is characterized by a very broad blaze that extends down to the upper lip and nostrils. This type of marking is visually striking, often covering a significant portion of the horse's face and giving it a unique and prominent appearance. The wide coverage distinguishes it from other markings, such as blazes or snips, which are typically more confined.

In contrast, the other choices describe different types of facial markings. A narrow white marking around the eyes would be classified as a "circumocular marking" and does not meet the criteria for a bald marking. A small spot located on the nose is referred to as a "snip," which is also not broad enough to be considered a bald marking. Lastly, a distinct line that runs across the forehead could represent a "forehead stripe" but lacks the extensive coverage characteristic of a bald marking.

Understanding these definitions helps recognize the unique traits of different facial markings in horses, making it easier to identify them accurately.