Larry is taking a walk in the park. the pollen in the air makes him sneeze constantly. what line of defense is his immune system exhibiting? a. first line of defense b. second line of defense c. third line of defense d. fourth line of defense reset next

A, the first line of defense. Like old pal Hagrid has answered once before, "there are 3 lines of defense, the first one is a combination of physical and chemical barriers that prevent all types of foreign agents from penetrating the outer layer of the body."

semen is the name of the fluid