We know that 'migrate' means to move. So since that, we need to add the -ing, and we know that we end up with the meaning "moving".
So migrating means moving from one place to another.
<u>The correct answer is A.</u> The diseases we immunize against are not gone and they are still deadly. These diseases still exist in many places in the world. Polio was eliminated from the United States thanks to vaccination, it still occurs in Afghanistan, Pakistan and Nigeria, being a serious problem there. If we do not get vaccinated this type of disease can return to the country.
Answer:
tbh I don't really understand stand the question so
