TASK DEFINITION: Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
PROBLEM: Category: elements 
Words: ice, fire, burn, let go, combustion

SOLUTION: let go

PROBLEM: Category: emotional status 
Words: down, emotional state, loveful, ashamed, flat

SOLUTION: flat

PROBLEM: Category: animal 
Words: eagle, bird, wave, fish, fly

SOLUTION:
wave