Dynamic equilibrium also known as Homeostasis is responsible for these fluctuations. Hope it helped!
It takes 27 days<span>, 7 hours, and 43 minutes</span>
B. is the correct answer. It makes sense too because vaccines are usually inserted in a vein, which is where the bloodstream is. With all of this medicine in your body, the virus will come into the body, the body will recognize what the virus is, sending out the antibodies from the vaccine into the bloodstream and all around, then the virus is dead. :)
The answer would be C, chemical messenger. This signals to other cats that that particular spot belongs to them; it serves as a warning. Hope this helps!
~Ash