Which of the following statements about saliva are correct?
1. Saliva is mainly water.
2. Saliva makes it easier for us to swallow our food.
3. Saliva softens our food.
A 1 and 2 only
B 1 and 3 only
C 2 and 3 only
D 1, 2 and 3
Its answer is option D because saliva is mainly water and it contains enzimes that softnes our food and makes it easier to shallow