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Explain How Scientists Distinguish Between The Background Extinction Event

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Explain How Scientists Distinguish Between The Background Extinction Event
How do scientists distinguish between the background extinction rate and a mass extinction event?
Scientists distinguish that mass-extinction rate is higher than the background extinction rate. Mass extinction effects everyone. Humans are relaying on other species for food, shelter, heat, and medicine. It is wide spread event that washout the majority of living plants and animals. (Enzor, 2013) Background Extinction rate are normal and is distinguish when the last individual of the species in the wild dies. Individuals in captivity do not count toward member of an extinct or living species. These species go extinct because not all life can be sustained on earth and species cannot survive.
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