Biologist Dr. Kevin Park argues that species extinction rates are currently 100-1000 times higher than natural background rates, indicating a sixth mass extinction.
6
readingWhich data would best support Park's mass extinction claim?
A
Scientists have identified millions of species
B
Some species are endangered
C
Fossil records show background extinction of 1 species per million per year; current documented extinctions are 100-1000 per million per year, with vertebrate extinctions matching mass extinction signatures
D
Habitats are shrinking
Correct Answer: C
Choice C is the best answer. Rate comparison to baseline + mass extinction signature proves extraordinary die-off.
💡 Strategy: "X times higher" claims need explicit baseline and current rate comparison.