B)if it is heated and put under pressure for long periods of time
If the temperature was too hot, it would become magma instead and the cycle would start all over again.
Mutations (changes) to the DNA within the cells.
Sebum, a fatty substance that serves as a water repellent it also serves as a natural antibacterial and antifungal agent,
yes the skin is important not only to excrete but its also a protective organ that absorbs oxygen and nitrogen