Stratosphere - holds the ozone layer of atmosphere.
The ozone layer or ozone shield exists in a region of Earth's stratosphere that interests most of the Sun's ultraviolet radiation. It includes a high concentration of ozone. The ozone layer is primarily found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers above Earth, although its thickness alters seasonally and geographically. The ozone layer includes less than 10 parts per million of ozone, while the average ozone concentration in Earth's atmosphere as a whole stands at about 0.3 parts per million.
The ozone layer absorbs 97 to 99 percent of the Sun's medium-frequency ultraviolet light, which otherwise would potentially harm revealed life forms near the surface.
The correct answer is option D.
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