Multiple Choice
A new,sixth global mass-extinction event appears to be occurring on Earth today.The most likely explanation for the dramatic loss of species is
A) climate change.
B) natural fluctuations in global temperatures and precipitation.
C) the evolution of new types of viruses.
D) human activity that alters natural environments.
E) decreases in atmospheric levels of oxygen.
Correct Answer:

Verified
Correct Answer:
Verified
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