Question

38. Which of these statements is correct about peristaltic movement? (A) It is the contraction and expansion of lungs. (B) It is the contraction and expansion of walls of food pipe. (C) It is the movement of limbs while walking. (D) It is the movement of blood throughout the body.​

Answer 1

Peristaltic movement is followed throughout food pipe by expansion and contraction.

NON NCERT:-

It's like movement by pressing toothpaste tube which pushes toothaste out of the tube, repeatedly in digestive system.