You are presented with the question "What can kill their host?" and the following answer choices: 
- cigarettes
 - bacteria
 - adding heat
 - heat or cold
 - burning
 - Dehydration
 - lungworms
 - Pollution

Now knowing that some parasites kill their host, but most do not and parasites include lungworms and GI parasites, choose the best answer.


 

       lungworms  