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: GET AN EDUCATION!
Clue: God willing, you'll learn enough about religion to know this word defined as belief in a single god

SOLUTION: monotheism

PROBLEM: Category: SHAKESPEARE
Clue: "Twelfth Night" opens with, "If music be the food of love," do this

SOLUTION: play on

PROBLEM: Category: ZOOLOGY
Clue: Swans often do this in a "V" formation

SOLUTION:
fly