Concept:A ruminant has a four-chambered stomach, and feed passes through the chambers in a fixed sequence.
Explanation:The feed first enters the rumen, where initial fermentation begins.
It then moves into the reticulum for further breakdown.
Next, it passes through the omasum, where water and some nutrients are absorbed.
Finally, it reaches the abomasum, which is the true stomach.
Thus, the correct passage is: rumen → reticulum → omasum → abomasum.
Answer:D. rumen → reticulum → omasum → abomasum