What distinguishes the Sorrel color in horses?

The distinguishing characteristic of the Sorrel color in horses is that it is indeed a type of chestnut characterized by a red or copper-red body. Sorrel horses typically exhibit a bright, shiny coat that often has a deep, rich color, setting them apart from other equine colorations. This distinctive red coloration can range from a light gold to a darker, vibrant red and is a common and well-recognized shade among horse breeds.

Other choices describe different color patterns found in horses. The mousy or smoky body color refers to a different color classification, often associated with gray or diluted colors. The option detailing a mix of black and white hairs describes a pinto or paint type coloration, which is not connected to the Sorrel color. Lastly, the yellow or gold body color aligns more closely with the palomino or buckskin classifications, rather than with Sorrel. Thus, option A accurately encapsulates the unique and defining traits of Sorrel horses.