- Primates: This group includes humans and ape species such as chimpanzees, gorillas, and orangutans. They are characterized by their high level of intelligence, social organization, and dexterous hands.
- Cetaceans: This group includes whales, dolphins, and porpoises. They are all marine mammals known for their social intelligence and complex communication systems.
- Felids: This group includes cats, tigers, lions, and leopards. They are all characterized by their retractable claws, sharp teeth, and predatory behavior.
- Elephants: This group includes African elephants and Asian elephants. They are the largest land animals and share several similarities, including their long trunks, large ears, and social behavior.
- Primates and cetaceans: Both groups exhibit high levels of intelligence and complex social structures. They are known for their ability to learn, communicate, and engage in cooperative behaviors.