Biologist Dr. Thomas Wong argues that de-extinction of species like woolly mammoths could help restore Arctic ecosystems and slow permafrost melting.
9
readingWhich ecological research would best support Wong's environmental restoration claim?
A
Mammoths have been cloned partially
B
Permafrost is melting
C
Arctic ecosystems have changed
D
In test plots where large grazers were reintroduced, permafrost temperatures dropped by 4°C as animals compacted snow and converted shrubs to grassland, which reflects more sunlight and insulates frozen soil
Correct Answer: D
Choice D is the best answer. Documented mechanism (grazing effects) + measured outcome (4°C cooler) proves ecological benefit.
💡 Strategy: De-extinction claims need functional ecological evidence from analogous modern cases.