Question

what is the first form of chemical digestion that food encounters when entering the digestive system?
tongue\tsaliva
pepsin\tmolars

Explanation:

The digestive system starts with the mouth. Saliva contains enzymes (like amylase) that begin breaking down carbohydrates, which is the first chemical digestion. Tongue is for mechanical mixing, pepsin acts in the stomach, and molars are for mechanical chewing. So saliva is the first for chemical digestion.

Answer:

saliva