Concept:Animals that chew the cud are called ruminants.
Explanation:Chewing the cud is the process of regurgitating partly digested food from the stomach back to the mouth for further chewing.
This behaviour is known as rumination.
Ruminants possess a specialised stomach with chambers such as the rumen and reticulum.
Common examples of ruminants include cattle, sheep, goats, and camels.
Amphibians, birds (aves), and reptiles do not chew the cud.
Answer:C. ruminants