You are presented with the question "What can cause harm to humans?" and the following answer choices: 
- cigarettes
 - viruses
 - steroids
 - air molecules
 - assassin bugs
 - vegetables
 - ladybugs
 - smoking tobacco

Now knowing that insect bites cause harm to living things and some assassin bug bites can cause an allergic, life-threatening reaction in humans, choose the best answer.


 

     assassin bugs    