Multiple choice The ozone layer in the upper part of the atmosphere protects us from Cosmic rays Ultrasonic waves Infra-red rays Ultraviolet rays Reveal answer Fill a bubble to check yourself D Correct answer Explanation The ozone layer in the stratosphere absorbs most of the Sun's ultraviolet (UV) radiation, protecting living organisms from harmful UV rays that can cause skin damage. It does not primarily block cosmic rays, ultrasonic waves, or infrared rays.