When europeans first came to north america, one of the most disastrous impacts on native populations was the introduction of "old world diseases." these diseases, such as smallpox, influenza, and plague, devastated the native american population as the number of settlers grew steadily. one author has called this "the greatest human catastrophe in history, far exceeding . . the black death of medieval europe." based on this scenario and what you know about the immune system, what can you conclude about the native american and european populations?

The immune system is responsible for maintaining us healthy by blocking viruses, parasites and bacteria that intend to attack the human body. We can conclude that since the immune systems of the native american people had not evolved in the presence of these novel microbes, diseases such as the plague, influenza and smallpox devastated them as the number of settlers grew.

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high