Animal life is a broad term that encompasses all living creatures, from the smallest insects to the largest mammals. The term can be broken down into three distinct categories: BIOTA, FAUNA, and zoology. BIOTA refers to all living organisms, including plants, animals, and microorganisms. FAUNA is a subset of BIOTA that specifically refers to animals, while zoology is the scientific study of animals. Together, these three terms encompass the entirety of animal life on Earth.