Imprinting is the answer.
Answer:
nitrogen, silicon, sodium, fluorine, diamond, phosphorus iron, copper,zinc,mercury,bronze,steel brass
I believe the correct answer is A) Silurian period occurred before the Neogene era, because the other answer are wrong.
Hadean eon ended before Silurian period.
Mesozoic and Permian era were after Silurian period.
