Resources that come from nature, some examples include: Water, Gold, Oil, Coal, Apples, Oranges, etc.
C.
This is because the water has undergone a physical change meaning that the effects can be reversed. If nothing was added or lost from the water the ice would be the exact same weight.
I think that different liquids have different freezing points because every liquid consists of different atoms and different things that make up the atom causing them to have different freezing points.
B, turns red litmus paper to blue