It is like a barrier, or wall. It helps infection and bacteria stay out. It can also help you indicate whether you are getting infection in the inside of your body. if you're skin is inflamed, that is a sign of disease or infection.
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Brainliest answer is always appreciated!<span />
Answer: parasitism
Explanation: Because it's relationship between two species of plants or animals in which one benefits at the expense of the other, sometimes without killing the host organism.
<span>The layer of Earth's atmosphere where atoms and molecules escape into space is referred to as the ozone layer</span>