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


question:
Category: ANCIENT TIMES 
Clue: Julius Caesar said this region was divided into 3 parts; Augustus divided it into 4, including Aquitania
answer:
gaul


question:
Category: "SONG"S 
Clue: The title of this 1976 No. 1 hit by Barry Manilow completes the line "I am music and..."
answer:

"i write the songs"