Question: The Black River is a tributary of Lake Erie about 12 mi (19 km) long in northern Ohio in the United States. Via Lake Erie the Niagara River and Lake Ontario it is part of the watershed of the St. Lawrence River which flows to the Atlantic Ocean. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Answer:
Natural Place