So there was one species of equine, and it became at least the three that remain today, yes? Ok, so how? By what process? Families aren't species. They are one category up from species, since they cannot produce fertile offspring cross-species. So lets go one more category up from there, to Perissodactyla, the order to which equine belongs. Are all members of Perissodactyla also a mere diversification of the original created species? How'd we get all the horses, the two or three types of rhinoceros, and tapers from that? What was the process?
You answered this earlier. Adaptation.
Also called evolution by natural selection. Welcome to the evolution accepting club. You've arrived. You now accept that the two extant species of rhinoceros, the tapir, and the three surviving species of equine are all related by means of stemming from a common ancestor species, and that the mechanism was evolution by natural selection (also called adaptation).
Creationists believe in natural selection and adaptation.
