Answer:
c
Cause at the bottom it is cold and up top is warmer
Diffusion is the random movement of molecules or particles from a region of high concentration to a region of low concentration bringing a natural flow in the system. Diffusion ensures that there is a state of equilibrium in the number of molecules in the system.
-look at the obvious
-analyze the artwork
-decide on an interpretation
-make a judgement call
The answer is B. Hope this helps. Please mark Brainliest:)