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: INITIALS M.S. 
Clue: She was in the TV miniseries "Holocaust" & starred in the Holocaust film "Sophie's Choice"

SOLUTION: meryl streep

PROBLEM: Category: THE NATURE OF THINGS 
Clue: This "colorful" whale can grow up to 100 feet long & weigh more than 150 tons

SOLUTION: a blue whale

PROBLEM: Category: "OY"! 
Clue: Perhaps from the French for "Cord fit for the King", it was originally woven from silk, not cotton

SOLUTION:
corduroy