The answer to your problem is question 3 i just took that test i got it right
The correct answer of the given question above is option A. The line of defense that his immune system is exhibiting in this situation is the first line of defense. The first line of defense includes the physical or external line of defense of the body that are responsible for inhibiting of the entry of foreign microorganisms. Such include the skin, tears, cilia, mucus, urine flow and even stomach acid.
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Thus, the correct answer is 'Carbon dioxide, water, and sunlight'.
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Explanation:
Proteins are important because they give you ability to fix broken bone or to grow.
