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: ANIMALS 
Clue: With a young one valued at $1.4 million, Guinness calls them the most costly zoo animals
giant pandas

Category: ANIMALS 
Clue: Odobenus, the genus name of this animal, comes from the Greek for "one who walks with his teeth"
walrus

Category: AFRICAN GEOGRAPHY 
Clue: From 1889 until 1961, this mountain's highest point was known as Kaiser-Wilhelm-Spitze

mount kilimanjaro