Question

Exposure to sunlight helps a person improve his health because

Answer 1

Exposure to sunlight helps a person improve his health because the ultraviolet rays convert skin oil into vitamin D.

Answer 2

here is the amswer.
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Exposure to sunlight helps a person improve his health because the sun's ultraviolet rays helps in converting the skin oil in the form of vitamin D.
And one more thing, skin oils are white lipid substance beneath our skin.

hope this will help you.