What is a strip marking on a horse's face characterized by?

A strip marking on a horse's face is distinguished by a long, thin white vertical marking that typically runs from the eyes down the nose. This type of marking is more specific than broader markings and gives a unique identification feature to the horse. It is commonly seen in various horse breeds and is used for identification and registering purposes, as markings can be a significant aspect in the context of equine lineage and breed standards.

In contrast to the other descriptions, a broad marking covering the entire face represents a different type of facial marking, often referred to as a blaze. Markings that only cover the nostrils would likely be indicated as a snip or a nose marking, and an isolated small spot situated between the eyes is known as a star. Each of these markings has its own definitions and characteristics, yet none match the specific description of a strip marking as accurately as the correct option does.