I believe pressure is the answer you are looking for here. Other forces that change the shape of rocks include weathering and erosion.
No. Weathering and erosion can change them and they can of course get damaged and crack. If they are in the sea, that can affect them. It can be a long and slow process, but rocks do change.
deformation
Water and wind cause erosion. Water and wind have a lot of interaction with rocks. When water and wind rub against rocks they take off tiny little dusty parts. Eventually after years of this system repeating the rocks start to give you a whole new shape. These rocks shape in all types of different ways. In fact most caves are made by erosion.
Locally, we can change it in small ways, by shifting dirt around. Digging canals, blasting rocks etc. But the overall shape remains the same.
Yes, this is why rocks in streams are generally smooth. Also, wind can shape rocks due to the small particles it carries.
because there is a change in shape
No, its erosion that causes rocks to change
because there is a change in shape
by borrowing in rocks and form ice wedding
because of rain
Elastic energy
slowly change
Because it changes from a solid shape (ice cube) to a liquid shape (Water)
The change in shape of rock (and any other material) due to stress is called strain.
Deformation
Size and shape.