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.

[Q]: Category: WEIGHTS & MEASURES 
Clue: To the Ancient Greeks, 4 of these made a palm
[A]: fingers


[Q]: Category: INSECTOID RHYME TIME 
Clue: A London apartment for a small biting fly
[A]: a gnat flat


[Q]: Category: THE EARTH 
Clue: The modified Mercalli scale ranks these 1-12:  1 - not felt except by few, 12 - total destruction
[A]:
earthquakes