Final answer:
Deer is a pseudo-ruminant because it has a digestive system that allows it to eat plant material and roughage. Pseudo-ruminants have a three-chamber stomach and a large cecum for fermentation and digestion.
Step-by-step explanation:
A pseudo-ruminant is an animal that has a digestive system similar to ruminants, but lacks a true rumen. Pseudo-ruminants, such as camels and alpacas, have a large cecum where plant materials are fermented and digested by microorganisms. They have a three-chamber stomach consisting of an omasum, abomasum, and reticulum.
In this case, the correct answer is option c) Deer. Deer are pseudo-ruminants because they have a digestive system that allows them to eat plant material and roughage efficiently.