I believe the answer is C but I’m not completely sure
Gene flow — also called migration — is any movement of individuals, and/or the genetic material they carry, from one population to another. Gene flow includes lots of different kinds of events, such as pollen being blown to a new destination or people moving to new cities or countries.
This is the gene cycle and if their mother has different gene then that will happen.
c natural variation in the bacteria means that some die while other are more resident and survive
