Final answer:
UV light and IR light have distinct roles in the feel-good sensation associated with sunlight. UV light induces the release of endorphins, contributing significantly to the feel-good sensation associated with sunlight.
Step-by-step explanation:
Based on the provided information, it can be inferred that UV light and IR light have distinct roles in the feel-good sensation associated with sunlight. UV light primarily induces the release of feel-good endorphins in the skin, while IR light provides the physical sensation of warmth. Therefore, option C) UV light and IR light have distinct roles, with UV light primarily inducing the release of endorphins and IR light providing the physical sensation of warmth is the most accurate statement regarding the impact of these two effects on the feel-good sensation associated with sunlight. Regarding the effects of UV light on human skin, the study suggests that UV light induces the release of endorphins, contributing significantly to the feel-good sensation associated with sunlight. Therefore, option A) UV light induces the release of endorphins, contributing significantly to the feel-good sensation associated with sunlight is the most accurate statement regarding the effects of UV light on human skin.