You are presented with the question "what can be painful and dangerous?" and the following answer choices: 
- Brutal temperatures
 - smoking cigarettes
 - Pesticides
 - ultraviolet light
 - weathering
 - hyperthyroidism
 - nutrients
 - oxygen

Now knowing that ultraviolet light causes sunburn and sunburns are painful and can be dangerous, choose the best answer.


 

    ultraviolet light     