Antibiotics are drugs that are able to fight diseases caused by bacteria. Besides, it is a "golden solution" that can kill harmful bacteria (pathogenic bacteria such as fungi, actinomycetes, ...), has the effect of inhibiting the growth and spread of of these bacteria.
Symbiosis can vary between mutualism, parasitism, and commensalism, tho these grade into each other, it is often difficult to tell which is involved in a given relationship.
I am not 100% sure but I thinking it responds when pathogens enter the body because the immune system is meant to protect your body from illness.
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We might lose things such as plastic bags, water bottles cardboard and glass it would be a shame if any of these things got lost we could be using the glass to help us build structures or we can even build things out of plastic and we can try helping people by building gains Lego blocks to craft out a house for them.
