I believe the answer to your question would be: Homeostasis.
The medulla oblongata detects the levels of oxygen and carbon dioxide concentrations and signals the muscles in the heart, the lungs and diaphragm to increase or decrease thebreathing. The pons controls the speed of inhalation and exhalation orrespiration rate depending on the need of the body.
Answer: a crack forms, magma pushes upward, rock moves outward, magma hardens.
I know this 100% fact
Explanation: