COW

 Here are 10 simple and easy lines about cow for primary students:

1. A cow is a domestic animal.

2. It has four legs and a long tail.

3. Cows are usually white, black, or brown.

4. A cow gives us milk.

5. Milk is good for our health.

6. Cows eat grass and plants.

7. The baby of a cow is called a calf.

8. Cows live in sheds or barns.

9. They are gentle and kind animals.

10. We should take good care of cows.