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.

Category: NEWSPAPERS 
Clue: In 1868 the 1st edition of this annual reference book was published by the New York World
the world almanac

Category: NORSE MYTHOLOGY 
Clue: Among this chief god's names were Bileygr, meaning "shifty-eyed" & Alfador, or "all-father"
odin

Category: PLANT LIFE 
Clue: The spiny shrub ocotillo takes these as its habitat & is common in the Sonoran & Chihuahuan ones

a desert