How do breathing passages keep pathogens out of the body?

phagocytes in the breathing passages destroy pathogens.

they produce antibodies that kill pathogens.

chemicals kill some pathogens.

mucus and cilia trap pathogens.

D. Muscus and cilia trap pathogens

have a good day!

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

its temperature is increasing. this causes molecular vibrations to increase.