PART B: Which detail from the text best supports the
answer to Part A?
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A. "Five times in Earth's history, some three-quarters
of all living species disappeared forever – and
within a short period of time." ( Paragraph 1)
B. "That's because the diversity of species in an
ecosystem – the breadth of different organisms
present – provide people with all types of services
we can't do without." ( Paragraph 3)
C. "We haven't lost that many – at least not yet. But
if current rates of species losses continue, such a
mass extinction could occur in just 300 years." (
Paragraph 8)
D. "From that point on, fossils of the vanished species
would no longer appear in the pages of Earth's
rock-based diary." ( Paragraph 9)