Given the question: Apollo (horse) - Apollo (1879-1887) was an American Thoroughbred racehorse. He won 24 races in his career including the 1882 Kentucky Derby.As of 2011 Apollo is the only horse to win the Kentucky Derby without having raced as a 2-year-old.Apollo was injured as a five-year-old and was retired from racing. He was given to a friend of Morris' wife that lived in Charleston for use as a saddle horse. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
The answer is:
Animal