Question

how did the formation of the ozone layer contribute to the existence of life on earth? it blocked the suns harmful uv rays. it caused water vapor to cool, condense, and collect. it released large amounts of oxygen into the air. it warmed earths surface, preventing materials from freezing.

Explanation:

The ozone layer absorbs most of the Sun's harmful ultraviolet (UV) radiation. This protection is crucial as high - levels of UV rays can damage living cells, cause mutations, and harm DNA. Without this protection, life on Earth would be severely affected.

Answer:

It blocked the Sun's harmful UV rays.