What is the primary difference between types and breeds of horses?

The primary difference between types and breeds of horses is indeed reflected in the distinction that types pertain to size and conformation, while breeds pertain to lineage and ancestry. Types categorize horses based on their physical characteristics, purpose, or general appearance. For example, a horse might be classified as a draft type due to its larger size and build, regardless of its specific breed.

On the other hand, breeds refer to specific groups of horses that share a common ancestry and established breeding standards. Breeds are often recognized officially and come with a pedigree that traces their lineage back through generations. This means that two horses can be of the same type but different breeds or vice versa.

Other options present different aspects that do not accurately capture the distinction. For instance, size doesn't necessarily dictate a horse's function or genetic characteristics directly, nor does color serve as a reliable classification for types or breeds. It’s the lineage that truly defines breeds, making the correct answer about size relating to types and lineage relating to breeds.