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 simplicity, answers should be in all lower cased letters.
PROBLEM: Category: YOU ARE SO FOXY! 
Clue: The foxglove plant is the main source of this medicine used as a stimulant  in damaged heart tissue

SOLUTION: digitalis

PROBLEM: Category: WORLD GEOGRAPHY 
Clue: The name of this large port city on Western Europe's Schelde River literally means "at the wharf"

SOLUTION: antwerp

PROBLEM: Category: BODY LANGUAGE 
Clue: It's what you're said to "hold" when you're keeping your big mouth shut

SOLUTION:
your tongue