Answer:
a. to defend against bacteria
Explanation:The skin helps protect the body and various body cells from infection. A break in the continuity of a skin can result into harmful germs,bacteria infection penetrating into the body system. Hence the skin is a protective covering from germs,infection.
Could you show me some options if you have any?
To move molecules across the membrane against a gradient
All members of the swine family lack sweat glands.