Why is a skin graft necessary when cells are damaged by a third-degree burn?

a. to promote the repair of existing cells
b. to protect the area from infection
c. to prevent mutations
d. to replace damaged nerves

Correct B) To protect the area from infection

Skin grafting is a surgical procedure in which a part of skin is removed from one area of the body and then transplanting it to another part of the body. It is   done when a body lost its protective covering of skin because of injury, burn or illness. It is used as either a permanent or temporary treatment.

Third degree burn affect the deeper tissues and if it is left to heal on their own it would lead to scarring. The main function of the skin is to protect loss of fluid from the body and prevent the entry of harmful micro-organism such as bacteria and viruses that cause infection to the body.

Hence, it is important cover the third degree burn with skin graft as it is more prone to infection and fluid loss from that area.