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: ANIMAL VERBS 
Clue: Nag or pester persistently
badger

Category: BIOLOGY 
Clue: Like mushrooms, molds belong to this group of organisms that lack chlorophyll
fungi

Category: WARRIORS 
Clue: In India's caste system, the Kshatriyas, or warriors, were ranked second; this caste was number 1

brahmans