TASK DEFINITION: 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.
PROBLEM: 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

SOLUTION: resolution

PROBLEM: Category: MY PLACE? 
Clue: A book subtitled "Architecture in the Colombian Countryside" showcases the estates called these in Spanish

SOLUTION: haciendas

PROBLEM: Category: U.S. CURRENCY 
Clue: In 1943 the Treasury Dept. minted this coin in zinc-coated steel

SOLUTION:
penny