Which of these animals is a ruminant?
A. cat
B. rooster
C. pig
D. goat
D. goat
To find out which of these animals is a ruminant, we need to understand what a ruminant is. Ruminants are a group of mammals that have a unique digestive system called "rumination." This process involves regurgitating partially digested food (known as cud) and then re-chewing it for further digestion.
Now, let's go through the options:
A. Cat: Cats are not ruminants. They have a simple digestive system and do not regurgitate their food.
B. Rooster: Roosters are birds and not ruminants. Birds, including roosters, have a different digestive system compared to mammals, and they do not ruminate.
C. Pig: Pigs are not ruminants either. They have a single-chambered stomach and do not go through the process of rumination.
D. Goat: Goats are indeed ruminants. They have a four-chambered stomach that allows them to go through the process of rumination. They chew their cud to break down the fibrous food they eat.
Therefore, the correct answer is D. goat.