Question

from studying seismic waves generated by earthquakes because we havent physically drilled into the earth. how do scientists primarily study and gain knowledge about the earths interior structure? by drilling deep boreholes by studying seismic waves from earthquakes by studying rock samples from volcanoes

Explanation:

The text states we haven't drilled into the Earth and that scientists study Earth's interior from seismic - waves generated by earthquakes. Rock samples from volcanoes mainly give info about surface - related or upper - mantle processes, not the whole interior. Seismic waves can travel through different Earth layers, providing insights into the interior structure.

Answer:

by studying seismic waves from earthquakes