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 consistency, answers should be in all lower cased letters.

Category: LANDMARKS 
Clue: The Mexuar, the Serallo & the Harem are parts of the Royal Palace in this complex overlooking Granada, Spain
the alhambra

Category: THE DIGESTIVE SYSTEM 
Clue: Gravity isn't required to move food down to your stomach; this process moves it down the esophagus
peristalsis

Category: A NOSE FOR GNUS 
Clue: A main predator of the adult gnu, it has a mane, too

lion