Answer:
vaccination
Explanation:
Vaccination also called immunization is the administration of antigenic material called a vaccine to produce active artificial immunity against a disease. Vaccination protects humans from infections of many diseases. Examples include tuberculosis poliomyelitis, whooping cough, diphtheria and measles.
Active artificial immunity is where antibodies are formed in response to administration of dead or weakened( attenuated) pathogens or chemically treated toxoids.
Here are the answers to the three questions on the right side of the page, as for the left, those are your own opinions, remember?
- plate tectonics: a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.
- three different types of late boundaries:Divergent boundaries -- where new crust is generated as the plates pull away from each other. Convergent boundaries -- where crust is destroyed as one plate dives under another. Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.
- crustal features formed at plate boundaries: Deep ocean trenches, volcanoes, island arcs, submarine mountain ranges, and fault lines are examples of features that can form along plate tectonic boundaries.
hope this helps ^^
