The answer is body's line of defense. The first line of defense which includes physical as well as chemical barriers would defend the body from infection. It would include the tears, cilia, stomach acid,urine, white blood cells,mucus and the skin. The skin is the largest organ and would act as a barrier from pathogens. If first line of defense won't work the second line will then be activated.
Answer:
A.explorer
Explanation:
one that explores especially : a person who travels in search of geographical or scientific information. 2 capitalized : a member of a coed scouting program of the Boy Scouts of America for young people ages 14 to 20 focusing on career awareness.
