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.
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Question: Category: SOCIAL SCIENCE 
Clue: It's the study of the principles of punishment as well as the management of prisons

Answer: penology


Question: Category: "E" BAY 
Clue: Thinking green, biologist Ernst Haeckel coined this term for the way animals interact with the environment

Answer: ecology


Question: Category: BODIES OF WATER 
Clue: For most of the year, ice floes & icebergs prevent navigation in this bay between Greenland & NE Canada

Answer:
baffin bay