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.
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Question: Category: "OUCH"! 
Clue: In Ancient Egyptian inscription, this oval figure held the names of royal personages

Answer: cartouche


Question: Category: THE ENVIRONMENT 
Clue: This word means catching an unsustainably high number of tuna & cod

Answer: overfishing


Question: Category: INVENTORS & INVENTIONS 
Clue: Robert Bunsen & Gustav Kirchhoff developed this device to see the wavelengths of light

Answer:
spectroscope