Fact 1: Skin is used for protecting the body from harmful substances. Fact 2: Eyes and skin are the critical organs. Given the two facts above, what are used for protecting the body from harmful substances?

pick from the following. I. critical organs; II. body critics; III. fur and fat; IV. protective bony armor; V. redundant organs; VI. layers of fat; VII. sea urchins; VIII. solar waves;
The answer is:
I.