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.
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Question: Category: A NOSE FOR GNUS 
Clue: A main predator of the adult gnu, it has a mane, too

Answer: lion


Question: Category: THINGS FARMERS KNOW 
Clue: The USDA's Risk Management Agency provides this, protecting against loss due to drought, hail & falling prices

Answer: insurance


Question: Category: 21 
Clue: This 21-year-old actress seen here has over 25 movies to her credit

Answer:
christina ricci