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: 19th CENTURY BUSINESSMEN 
Clue: In 1873 he founded the J. Edgar Thomson works near Pittsburgh, naming the steel mill for the Penn. railroad president

SOLUTION: carnegie

PROBLEM: Category: WY WYOMING? 
Clue: This large prairie animal is featured in white silhouette on the state flag

SOLUTION: buffalo

PROBLEM: Category: YOU'RE TOYING WITH ME 
Clue: The "building" type of these has come to refer to any basic components

SOLUTION:
blocks