Give TWO reasons why mechanical digestion of food is important! Marking brainliest

Mechanical digestion is a purely physical process that does not change the chemical nature of the food. Instead, it makes the food smaller to increase both surface area and mobility. It includes mastication, or chewing, as well as tongue movements that help break food into smaller bits and mix food with saliva.

Explanation:

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If the experiment was perfomed more then once and you get the same results

The correct answer is  b)