Diffusion because it requires no energy
Answer:
Done!
Explanation:
There is not a problem with the model. The atoms are tightly compacted to get, so if you were to cut it in half the split would also be smooth and straight. For example, a grain of salt is rough on the outside, but when you cut it in half the split is smooth. It is the same with the atoms in the model.
Correct answer is Core.
The core can consist to the crust, mantle, etc. to the Earth. Volcanic activity comes straight from these areas and can compose these features.
