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.

[EX Q]: Category: SIGNS & SYMBOLS 
Clue: Symbols of mystery, they're the mysterious doubles of the people who cast them
[EX A]: shadows

[EX Q]: Category: PHONETICS 
Clue: A velar consonant, like the first sound in "good" or "king", applies the tongue to the soft this
[EX A]: the palate

[EX Q]: Category: WORD ORIGINS 
Clue: Literally "god from a machine", this term refers to a god introduced to resolve a plot
[EX A]:
deus ex machina