is the involuntary movement of the muscles that move food through the digestive system.

peristalsis

Explanation:

a wave like motion that occurs in the stomach to move food down

Peristalsis is the involuntary movement of the muscles that move food through the digestive system.

Explanation:

Peristalsis is the involuntary constriction and relaxation of the muscles of the intestine or another canal. It creates wave-like movements that push the contents of the canal forward.

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answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

some of your causes might be acidic rain or natural wildfires that cause the parks to be degraded

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