You are presented with the question "What increases ultraviolet light?" and the following answer choices: 
- heating liquids
 - clouds
 - smog
 - emissions
 - less ozone
 - gravity
 - sun's heat
 - photons

Now knowing that ozone depletion results in higher levels of UV radiation reaching Earth and ozone absorbs ultraviolet radiation, choose the best answer.


 

     less ozone    