An arrangement or placement with particular purpose.
I think it's d because to me that's the only one that makes sense out of all of them.
<span>An Indian Father's Plea - Education Week Teacher</span>
Answer:
Transplantation is necessary because the recipient's organ has failed or has been damaged by disease or injury. Organ transplantation is one of the great advances in modern medicine. Unfortunately, the need for organ donors is much greater than the number of people who actually donate.
Explanation: