Ascientist has a fossil that was found in a layer of rock close to earth’s surface. he believes that the fossil is around 12,000 years old.

which method would best allow the scientist to confirm the actual age of the fossil?
finding another fossil in a deeper layer of rock
finding another fossil in the same layer of rock
using carbon/nitrogen absolute dating
using potassium/argon absolute dating

 using carbon/nitrogen absolute dating.
Absolute dating is  the process of determining an age on a  specified time scale in archeology and geology
This method can be used on material up to about 60000 years old.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.