Answer:Green vegetables
Explanation: Defecation postoperative is the term related to the bowel functioning in the human body. This consults with the excretion of the excess from the body is not happening properly.It also depends upon the type of food intake a human does .
So, to resist the straining pain on defecation postoperative period ,client should take healthy and digestive food .Thus, green vegetables are a good option in this kind of situation.