Which massive herbivorous odd-toed animal has thick skin and one or two horns?

• A. Hippopotamus
• B. Giraffe
• C. Elephant
• D. Rhinoceros

Answer: (D)

Understanding the traits of large herbivorous odd-toed ungulates helps identify this animal. Among such mammals, rhinoceroses stand out for two signature features: very thick, tough skin that looks almost armor-like, and one or two horns on the snout made of keratin. That combination—massive size, thick hide, and a horned snout—points directly to the rhinoceros.

The other animals don’t fit this exact profile. Hippos are large and thick-skinned herbivores, but they don’t have horns and they belong to a different group of hoofed mammals. Giraffes have ossicones on their heads rather than true horns, and elephants lack horns entirely, relying on tusks and trunks instead. So the creature that best matches both the size, the thick skin, and the presence of one or two horns is the rhinoceros.