as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
classify the following 3 animals into a correct category: elephant, octopus, and bat.
user
elephant: mammal 
octopus: mollusk 
bat: mammal
assistant