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 simplicity, answers should be in all lower cased letters.
question:
Category: A "COCK"-EYED CATEGORY 
Clue: A staged battle between 2 roosters
answer:
cockfight


question:
Category: OPTICS 
Clue: On New Year's or any other day, it's the fineness of detail that can be distinguished in a photographic image
answer:
resolution


question:
Category: THE SCIENCE OF AUTUMN 
Clue: The migratory formation of the waterfowl named for this nation gives the trailing birds easier flying
answer:

canada