Which feature helps identify a rhinoceros?

Correct answer: One horn and thick skin

Direct answer: Option D is correct. A rhinoceros is a large herbivorous mammal with very thick skin and a horn on its nose; the Indian rhinoceros is commonly identified by its single prominent horn and folded, armour-like skin. Option A, trunk, is wrong because a trunk is the long nose of an elephant, not a rhinoceros. Option B, long neck, is wrong because a long neck is associated more strongly with animals such as giraffes, not rhinos. Option C, colourful feathers, is wrong because rhinoceroses are mammals and have hair, not bird feathers. Option D correctly gives the identifying features in this question. The one-horned rhinoceros is strongly associated with Assam and protected areas such as Kaziranga, although a location is not itself the identifying body feature. Memory cue: elephant has a trunk; rhino has thick skin and a horn.