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: -OLOGIES 
Clue: Seismology studies the seismic waves produced by these plate shifts

Answer: earthquakes


Question: Category: DESIGN 
Clue: Derived from scutum, the Latin for "shield", it's a shield bearing a coat of arms, or a metal plate around a keyhole

Answer: escutcheon


Question: Category: "EU" VEY! 
Clue: This crumbly coffee cake topping is often paired with "swirl"

Answer:
streusel