You are presented with the question "Melting is when something that is part of what is heated above its melting point?" and the following answer choices: 
- organic molecules
 - gas
 - measuring system
 - Water expanding
 - colloidal system
 - objects that have mass
 - pot
 - an object

Now knowing that melting is when solids are heated above their melting point and colloidal systems are suspensions of solid matter in liquids, choose the best answer.


 

     colloidal system    