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: MAGAZINES ON THE WEB 
Clue: The website for this defunct mag has the "most amazing collection of professional photography on the Web"
life

Category: -OLOGIES 
Clue: From the Greek for "growing in", it studies the development of organisms in their earliest stages before birth
embryology

Category: GOOD MANORS 
Clue: Great Chalfield, a medieval manor, has one of these water-filled trenches

a moat