Which of the following muscle tissues is not striated and is responsible for involuntary peristalsis (wave-like contractions), which moves food through the gastrointestinal tract.

all of the above
skeletal
smooth
cardiac

Smooth muscle.

Explanation:

Smooth muscles are muscles non striated and involuntary muscles that are found in the walls of digestive organs and help to move food along the digestive system through peristalsis. The help to regulate flow of food in the system. Smooth muscles also function in relaxing and contracting the walls of arteries, ducts ,uterus e.t.c.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully