instruction:
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.
question:
Category: PICTURE BOOK TITLE ANIMALS 
Clue: "If You Give a ____ a Cookie"
answer:
mouse


question:
Category: THE ONLY 
Clue: "The Lady In My Life" & "Baby Be Mine" were the only 2 songs on this 1983 album not to be Top 10 hits
answer:
thriller


question:
Category: EARTH 
Clue: Heat rising from within the Earth is mostly from this type of decay of elements like uranium & thorium
answer:

radioactive decay