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: CALVINISM 
Clue: Calvinists use this word, also a name for a season, to describe Adam & Eve's disobedience

SOLUTION: the fall

PROBLEM: Category: MUSIC 
Clue: Webster's defines this word as "a chord of three tones consisting of a root with its third and fifth"

SOLUTION: a triad

PROBLEM: Category: MUSIC 
Clue: Popular operettas he wrote in the 1920s include "The Desert Song" & "The Student Prince"

SOLUTION:
sigmund romberg