Hey there!
If there is a temperature difference between two objects, the object that has a higher temperature will want to level out its heat. Therefore, it will transfer the heat it needs to the other object if it allows until they are the same temperature.
I hope this helps!
Answer:
there are changes in the climate which result in the enviorment changing
i think that the first picture (the one with snow) happened first because it shows the most "natural" of them all, with snow in the beguning and melted into picture number 2 (the gray pic). it shows climate changing resulting in the mountain snow to melt faster and developing into something similar but different.
hope this helps:)
