True. vaccines will make you sick, so that your body may become better at identifying sicknesses later and become immune to such sickness
This is called activation energy
A i think because just because their pedestrians doesn’t make them any different.
In my opinion, the best answer among the choices listed above is option D. The reason why scientists use models because they can <span>represent things that are too small to see. Models are used to describe and explain certain phenomena. Hope this answers the question.</span>