Question

gravitation, magnetic field and seismic activities are the major source of information
​

Answer 1

Here is your answer:

Indirect sources include meteors that at times reach the earth, gravitation, magnetic field, and seismic activity. Most of our information about earth's interior has come from seismic studies. Seismic waves produced during an earthquake are recorded by a seismograph when these waves reach the surface of the earth.

Explanation:

I hope it helps you.

Mark me as branliest.

Be happy dude:)

Stay Safe Stay Healthy.....