Final answer:
Type I skin on the Fitzpatrick scale refers to very fair skin that always burns and does not tan.
Step-by-step explanation:
The Fitzpatrick scale is a classification system used to categorize human skin color and its response to UV radiation. Type I skin on the Fitzpatrick scale refers to very fair skin that always burns and does not tan.
People with type I skin have the highest risk of sunburn and sun damage. They have an extremely low amount of melanin, the pigment that helps protect the skin from UV rays.
Therefore, the correct answer for what is true of type I skin on the Fitzpatrick scale is a. always burns.