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 consistency, answers should be in all lower cased letters.
PROBLEM: Category: "Y"?
Clue: You can split the atom or even do barrel rolls using this toy

SOLUTION: a yo-yo

PROBLEM: Category: HOMOPHONES
Clue: A plant of the parsley family, or a unit to measure the fineness of gold

SOLUTION: carrot/karat

PROBLEM: Category: ANIMAL PHRASES
Clue: To ward off hunger is to keep this animal "from the door"

SOLUTION:
wolf