Final answer:
Type 1 skin in the Fitzpatrick skin typing system is the one that burns most readily, characterized by very fair skin, freckles, and a high susceptibility to UV radiation.
Step-by-step explanation:
The Fitzpatrick skin typing system classifies skin types according to the amount of pigment in the skin and its reaction to sun exposure. This system is used to predict the risk of sunburn and skin cancer. Among the types listed, Type 1 is the skin type that burns most readily. People with Type 1 skin usually have very fair skin, freckles, and red or light-colored hair. They always burn and rarely tan when exposed to UV radiation.