Which word does NOT belong with the others? leopard, cougar, elephant, lion

Given data

• Options: leopard, cougar, elephant, lion.

Concept/Approach
Classify each item by biological family and common characteristics to find the outlier.

Step-by-step reasoning
Leopard, cougar, and lion are all large predatory cats in the Felidae family.Elephant belongs to a different order and family (Proboscidea; Elephantidae) and is a herbivore with very different anatomy and behavior.

Verification/Alternative
Diet check: big cats are carnivores; elephants are herbivores.Taxonomy check: felids vs. proboscideans confirms separation.

Common pitfalls

• Choosing cougar because of name unfamiliarity; it is still a big cat like leopard and lion.
• Grouping by habitat rather than biological family.

Final Answer
elephant