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mr_godi [17]
3 years ago
7

Select the correct answer.

Health
1 answer:
kolezko [41]3 years ago
4 0

Answer:

A.

first line of defense

Explanation:

The first line of defense acts to prevent external substances from entering the body hence sneezing out the pollen acts to expel the pollen from entering his windpipe thus is the first line of defense.

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