You are presented with the question "stratosphere composition causes higher levels of what reaching Earth" and the following answer choices: 
- aliens
 - dust
 - scattered light
 - photons
 - emissions
 - ozone
 - UV radiation
 - sunlight

Now knowing that ozone depletion results in higher levels of UV radiation reaching Earth and ozone depletion in the stratosphere is a global problem , choose the best answer.


 

       UV radiation  