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.

[EX Q]: Category: FAMOUS AMERICANS 
Clue: He once promised, "As long as there is imagination left in the world" his theme park would never be completed
[EX A]: walt disney

[EX Q]: Category: "E" BAY 
Clue: Thinking green, biologist Ernst Haeckel coined this term for the way animals interact with the environment
[EX A]: ecology

[EX Q]: Category: ANTHROPOLOGY 
Clue: In 2009 scientists suggested that Ida, a 47-million-year-old fossil, was one of these, a hypothetical bridge species
[EX A]:
a missing link