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.

[Q]: Category: LEISURE ACTIVITIES 
Clue: In origami, folding paper down, away from you, is a mountain fold; folding it up toward you is this opposite
[A]: a valley


[Q]: Category: NATIONAL GEOGRAPHIC 
Clue: The Vogalonga, an annual regatta seen here, takes place in this city
[A]: venice


[Q]: Category: "M"ENAGERIE 
Clue: Though its voice is shrill, this small monkey's name is derived from Old French "marmouser", to murmur
[A]:
a marmoset