In which part of the stomach do grass-eating animals store quickly swallowed grass?

Correct option is A

The correct answer is (a) Rumen
Explanation:
● Grass-eating animals (ruminants) swallow grass quickly and store it in the rumen, the first part of their four-chambered stomach.
● Here, the food gets partially digested and is called "cud."
Information Booster:
● The four chambers are: Rumen, Reticulum, Omasum, and Abomasum.
● Abomasum is known as the "true stomach."
Additional Knowledge:
● Villi – Finger-like projections in the small intestine for absorption.