Name one ruminant animal.

• A. Pig
• B. Horse
• C. Chicken
• D. Cow

Answer: (D)

A ruminant is an animal that digests plant material using microbes in a four-chambered stomach and often regurgitates food to chew it again, a process called cud-chewing. The cow fits this pattern perfectly: it has a rumen, reticulum, omasum, and abomasum, which together host microbes that break down fibrous forage like grass and hay. This setup allows efficient fermentation of tough plant fibers before digestion continues in the higher stomach chambers.

In contrast, pigs have a simple monogastric stomach without rumen fermentation, horses rely more on hindgut fermentation after the stomach and cecum, and chickens are birds with a different digestive layout that lacks a rumen. So, among these options, the cow is the ruminant.