Exposure to sunlight helps a person improve his health because ________?
AResistance power increases
BThe pigment cells in the skin get stimulated and produce a healthy tan
CThe infrared light kills bacteria in the body
DThe ultraviolet rays convert skin oil into Vitamin D
Correct answer
D. The ultraviolet rays convert skin oil into Vitamin D
Explanation
The ultraviolet rays convert skin oil into Vitamin D is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.