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.

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


[Q]: Category: "OVER" & "OUT" 
Clue: The remote part of Australia
[A]: the outback


[Q]: Category: PIONEER LIFE 
Clue: Before his dictionary, he put out 1783's "American Spelling Book", a mainstay of pioneer schooling
[A]:
webster