Question
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1. PART A: Which statement identifies the central
idea of the text?
• A. Humans have been the main contributors to the
past five mass extinctions and are now causing
the sixth.
• B. Mass extinctions are a part of Earth's history, and
the oncoming sixth extinction will take place with
or without human activity.
O C. Humans have already had too profound of an
impact on biodiversity in the world to prevent
the oncoming sixth mass extinction.
• D. Another mass extinction, brought about by
humans, would eliminate many of the resources
humans rely on.
Answer
A. Humans have been the main contributors to the past five mass extinctions and are now causing the sixth.