Adding salt to a liquid decreases the melting point of that liquid, and impurities like salts would also help by lowering the melting point. Given these facts, what decreases the melting point of liquid among the following options:
- Dilution
 - Impurities
 - Water expanding
 - Dehydration
 - Heat energy
 - Pollution
 - Time and energy
 - evaporation


 

  Impurities       