Final answer:
Seismic studies are commonly used to study the Earth's layers by measuring the transmission of seismic waves through the Earth. None of the given options are correct.
Step-by-step explanation:
One common method used to study the Earth's layers is seismic studies. Scientists measure the transmission of seismic waves through the Earth to learn about its interior.
By monitoring the seismic waves in different locations, scientists can determine the layers through which the waves have traveled, showing the presence of solid, liquid, and semi-fluid layers. Seismic studies provide valuable information about the composition and structure of the Earth.
This explanation suggests that none of the options mentioned is correct.