These mold spores have been prevented from harming the body by a physical barrier. Thus, the correct option for this question is C.
What are physical barriers?
Physical barriers may be defined as those barriers that prevent pathogens from reaching specific potential sites of infection. Examples of physical barriers include skin, mucous membranes, and endothelia.
The living of mold spores on the skin illustrates the physical barrier. The skin is the first line of defense.
It protects the entry of any microbes to the site of infection. It gives a similar type of response to all types of microbes as it is a part of innate immunity.
Therefore, these mold spores have been prevented from harming the body by a physical barrier. Thus, the correct option for this question is C.
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