They separate because of different densities.
That statement is true
Despite its cheap price, The usage of coal as an energy source will release <span>sulfur dioxide, nitrogen oxides, to the air around our environment.
This substance will give negative effects such as acidic rain that could be corrosive to our body and polluted air that is bad for our respiratory system.</span>
Answer:
A. A liquid is changing to a solid
hope this helps
