The large animal that is the closest living relative to elephants is the manatee, also known as the sea cow. Interestingly, elephants and manatees share a common ancestor that lived millions of years ago. This relationship highlights the fascinating evolutionary history of mammals. Elephants belong to the order Proboscidea, while manatees are part of the order Sirenia. Both of these orders have unique adaptations that suit their environments. The connection between these two animals serves as a reminder of the diversity and interrelatedness of life on Earth.