alinanikitskiy
alinanikitskiy alinanikitskiy
  • 09-01-2017
  • Biology
contestada

Climate change, volcanic eruptions, sea level rise, and changes to the atmospheric chemistry have contributed most significantly to

Respuesta :

Аноним Аноним
  • 11-01-2017
Below are the choices can be found elsewhere:

background extinction rates
historical mass extinctions
       increased threats to modern endangered species
       habitat fragmentation
        overexploitation of species

I think the answer is 
Historical mass extinctions

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