The answer is false. <em>Topographical</em> maps show elevation on the Earth's surface.
When particles spread out it is called diffusion.
These preparations are called Vaccines. A vaccine is a biological preparation that provides active acquired immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing micro-organism and is often made from weakened or killed forms of the microbe, its toxins or one of its surface proteins.
Answer:
Im pretty sure its A if I read that right.
Explanation:
hope this helps
