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: SUN 
Clue: In the main reaction making the sun's energy, 2 of these nuclear particles fuse & one becomes a neutron

Answer: protons


Question: Category: KNOW YOUR BIBLE 
Clue: Noah's Ark was made of gopher wood & measured 300 of these units in length

Answer: cubits


Question: Category: LOUISIANA 
Clue: During Carnival season, nearly a million visitors attend this Shrove Tuesday celebration in New Orleans

Answer:
mardi gras