You are presented with the question "What can be dangerous?" and the following answer choices: 
- Pesticides
 - friendship
 - Ultraviolet light
 - love
 - influenza
 - killing insects
 - if humans disturb bears
 - progression

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


 

   Ultraviolet light      