Question

much of the general structure and physical properties of the interior of the earth are inferred from _____.
deep oil and gas bore holes
geologic investigations
analysis of seismic waves
study of volcanoes

Explanation:

Seismic waves travel through the Earth's interior and their behavior (such as speed and direction changes) provide information about the Earth's structure and physical properties. Deep oil and gas bore - holes are limited in depth and scope. Geologic investigations mainly focus on the surface and near - surface. The study of volcanoes gives information about the upper mantle and crust but not as comprehensive as seismic wave analysis for the whole interior.

Answer:

C. analysis of seismic waves