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: OLD HISTORY 
Clue: In this work Virgil wrote that "a woman is always a fickle, unstable thing"

SOLUTION: the aeneid

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

SOLUTION: earthquakes

PROBLEM: Category: MYTHOLOGY 
Clue: According to Hesiod, there were only 3 of these one-eyed giants:  brontes, steropes & arges

SOLUTION:
cyclops