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: SCIENCE CLASS 
Clue: (Sofia of the Clue Crew reports)  Botanists divide a flower into four main parts: sepals, petals, stamens & these
pistils

Category: HERE'S TO WATER 
Clue: This city's water treatment plant, the world's largest, lies on a 61-acre peninsula that extends into Lake Michigan
chicago

Category: COASTING ALONG 
Clue: L.A.'s Sunset Boulevard ends at this road known as PCH

pacific coast highway