What is toxic
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Explanation:

toxic person is anyone whose behavior adds negativity and upset to your life. Many times, people who are toxic are dealing with their own stresses and traumas.

Toxicity is the degree to which a chemical substance or a particular mixture of substances can damage an organism.[1] Toxicity can refer to the effect on a whole organism, such as an animal, bacterium, or plant, as well as the effect on a substructure of the organism, such as a cell (cytotoxicity) or an organ such as the liver (hepatotoxicity). By extension, the word may be metaphorically used to describe toxic effects on larger and more complex groups, such as the family unit or society at large. Sometimes the word is more or less synonymous with poisoning in everyday usage.

Explanation: