Identify one type of pathogen or infectious agent. Describe ways to prevent the spread of the diseases this type of pathogen can cause and explain why these preventative measures are important.

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?