Task: Text Categorization
Input (English): Context: Lepeophtheirus is a genus of sea lice. The best-known species is L. salmonis the salmon louse. Other species include L. pectoralis which uses flatfish as its host particularly the European flounder.
Question: The document can be classified to which topic? 
Options: 1)Athlete, 2)Village, 3)OfficeHolder, 4)Animal, 5)WrittenWork
Output (English): 4