The skin IS considered a organ as it is apart of the integementry system. And it is the largest organ in the body. The skin has a epidermal layer, a dermal layer, fatty tissue, and several other associated factors.
Answer:
Emotional Well Being = the quality of a person's everyday experience such as joy, fascination, anxiety, sadness, anger, and affection. Life Evaluation = a person's thoughts about his or her life (on a longer time scale). These measure different things; they are not just measures of the same thing.
It's due to the increased production of Melanin that helps block UV light