Question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Mostazal River -  The Mostazal River is a river in the Coquimbo Region in Chile. It flows from east to west and changes its name to Rapel River (Coquimbo) which flows into the Embalse La Paloma.
Answer:
Natural Place