The ozone layer to sustain terrestrial life by
a.
absorbing incoming uv radiation
b.
keeping levels of ozone in the troposphere low
c.
maintaining the earth's temperature structure
d.
all of the above

The ozone layer helps to sustain terrestrial life by absorbing incoming UV radiation, keeping levels of ozone in the troposphere low, and also maintaining the earths temperature structure. Life would be destroyed if the ozone was not here to help keep earth safe. The correct answer is D, all of the above.