Assertion : Chewing is one of the important process of digestion in animals.
Reason : It helps in enzyme action.
Chewing food helps in ptyalin action (ptyalin or salivary amylase is a starch hydrolysing enzyme present in the saliva of human), because it mixes the food with saliva. It also breaks food particles into smaller particles with greater surface area exposed to enzyme action. It also starts starch digestion in mouth.