A measure of thermal energy transferred between two different bodies at different temperatures would be the correct answer. So, the third option.
Tap water and rain water are both homogeneous, even though they may have different levels of dissolved minerals and gases. A bottle of alcohol is a man-made homogeneous mixture, from a fine Italian wine to a glass of Scotch whisky. In the human body, blood plasma is an example of a homogeneous mixture.
Solids are tightly compacted
Liquids are medium
And gases are very spaced and floating around
Electrolysis and heat can separate a compound into its elements.
I hope this helped you!
