Your answer is b idk why they want me to put 20 characters for this
1 the youngest rock is layer d and the oldest is a 2 layer h is magma springing to the top
3 tectonic shifting
4 mostly techtonic shift but after they formed the mountains
5 layer f
6 lava
Sometimes they could have something wrong with their brain which causes them to act in ways they can not control
The spinal cord is the answer you are looking for.