Answer:
A healthy diet is essential for good health and nutrition.
Explanation:
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The material found in the digestive system that aids in digestion and also kills pathogens would be "stomach acids", specifically hydrochloric acid.
Answer:
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Hiv and AIDS can be spread by people sharing the same needles for drugs, this happens because the virus goes through the infected persons blood stream and when you use a needle it touches the infected blood the virus holds on to the needle and then it gets passed to the next person making them infected.