You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
--------
Question: Category: WORDS FROM PLANETS 
Clue: The area for the orchestra on the biggest planet

Answer: a pit


Question: Category: ABOUT BUILDINGS 
Clue: They're the slender towers that are part of a mosque & from which Muslims are called to prayer

Answer: the minarets


Question: Category: "RIO" GRAND 
Clue: The Office of Surface Mining is part of this U.S. government department

Answer:
the department of the interior