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: YOU'RE AN ANIMAL 
Clue: The plains variety of this animal has gray markings that are known as shadow stripes

Answer: a zebra


Question: Category: U.S. ENDANGERED SPECIES 
Clue: It's not only the chinook; the sockeye species of this fish is endangered also

Answer: salmon


Question: Category: SPORTS TRIVIA 
Clue: Since "S" stands for "sacrifice", this letter has been used to symbolize "strikeout" since the 1860s

Answer:
k


