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 consistency, answers should be in all lower cased letters.
question:
Category: INSECTOID RHYME TIME 
Clue: A London apartment for a small biting fly
answer:
a gnat flat


question:
Category: ENVIRONMENTALISM 
Clue: The world's first national park was Yellowstone, opened in 1872; this country opened its first park at Banff in 1887
answer:
canada


question:
Category: TO EVERY THING THERE IS A SEASON 
Clue: Song in which Don Henley could "see you, your brown skin shinin' in the sun"
answer:

"the boys of summer"