Answer:Natural barriers and the immune system defend the body against organisms that can cause infection. (See also Lines of Defense.) Natural barriers include the skin, mucous membranes, tears, earwax, mucus, and stomach acid.
Explanation:hope this helps:D happy early hallowen
Answer:Protein Efficiency Ratio
Explanation:
The answer to your question is eating a variety of food.
Therefore, your sentence should be
Eating a variety of food daily will help you ensure you get all the nutrients you need.
Hope this helps :)