That's D. Viral Reproduction.
It's not A cuz those are not bacteria
It's not B cuz diffusion deals with passive transport across membranes
It's not C cuz gamete formation deals with sex
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.
B Bits being blown off a rock by heavy winds
The answer is d. semi permeable nature of the membrane
