Available options:
(1). cells;
(2). gills;
(3). HIV;
(4). skin;
(5). immune;
(6). rabies;
(7). lungs;
(8). Herpes;
Q: Fact 1: Skin is used for protecting the body from harmful substances. Fact 2: Natural toxins can be harmful too. Given the two facts above, what organ in the body can protect you from toxins?
A:
(4).