Given the question: Hippopotamus (genus) - Hippopotamus is the name of a genus consisting of one extant species Hippopotamus amphibius also known as the Hippopotamus and several extinct species. It belongs to the family Hippopotamidae which also includes the Pygmy Hippopotamus (Choeropsis liberiensis) and a number of extinct genera. 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