Answer:
D) Majority; unvaccinated
Explanation:
Herd immunity is a form of immunity that occurs when the vaccination of a significant portion of a population (or herd) provides a measure of protection for individuals who have not developed immunity
<span>The pharynx forms the food substance into balls and then pushes it/them into the </span>esophagus. From there it goes to the stomach where acids take care of it.