Answer:
a. helps regulate body temperature
Explanation:
The "Integumentary System" of the human body is the <em>"Skin</em>," which is considered the<em> largest organ</em>. It consists of the following functions: <em>Protection, Sensory, Thermoregulation and Vitamin D Synthesis. </em>
Under "Thermoregulation," the skin helps regulate the body's temperature. For example, when a person exercises, the skin becomes red. This is because the arterioles have to dilate<u> in order for heat to escape from the body</u>. It is also coupled with<em> "sweating."</em> This helps the body lower its temperature. This makes choice a correct.
<em>Choice b</em> and<em> choice c</em> are functions of the skeletal system. It helps the body move and it also stores mineral within the bones.