Biology · Human Physiology
Moderate exposure to sunlight helps a person improve their health primarily because:
- 1the ultraviolet rays convert skin-associated sterols into Vitamin D✓
- 2melanin pigment cells stimulate and shield the muscles
- 3it increases overall physical resistance power automatically
- 4the infrared light directly kills all harmful bacteria in the blood
Correct answer
the ultraviolet rays convert skin-associated sterols into Vitamin D
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