Please answer the following question: Knik River - The Knik River /knk/ is a 25-mile-long (40 km) river in the U.S. state of Alaska. Its source is at Knik Glacier from which it flows northwest and west and empties into the head of Cook Inlet's Knik Arm near the mouth of the Matanuska River. It is bridged twice (old and new bridges) where the Old Glenn Highway crosses it near the Butte and also bridged on the Hayflats. It is characterized by a broad flat plain with a bed of finely ground gravel and sand and silt. 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?
Answer:
Natural Place