Three species of tigers have gone extinct due to overharvesting or habitat destruction.This is an example of:

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The extinction of the three tiger species is a result of increased extinction rate by human activity such as hunting and destruction of their natural habitats. This is not a mass extinction event, background extinction rate refers to the "normal" rate of species extinctions that occur in the absence of human influence, sympatric speciation refers to the development of new species while occupying the same geographical are, and adaptive radiation refers to the rapid diversification of a single ancestral line to multiple new species in a short period of time.

Three Species of Tigers Have Gone Extinct Due to Overharvesting