If treating water is used to remove chlorine, pesticides, and heavy metals before drinking, then what does treating water remove before drinking it?

Answer choices:
- direct damage to the lungs
 - h2o
 - an area swollen with pus
 - chlorine, pesticides, heavy metals
 - molecules
 - vapor
 - Mutagenic chemicals
 - nonliving organic matter

 

    chlorine, pesticides, heavy metals      