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

SOLUTION: protons

PROBLEM: Category: HANNA-BARBERA DOGS 
Clue: In one episode of the original "Jetsons", a millionaire tried to take him away

SOLUTION: astro

PROBLEM: Category: DRAMA & DRAMATISTS 
Clue: This 1961 Tennessee Williams play takes place at the Costa Verde, a small Mexican hotel on a jungle-covered hilltop

SOLUTION:
night of the iguana