How do geologists study direct evidence of earth’s interior?
a)by collecting core rock samples
b)by measuring seismic wave activity
c)by analyzing how living things survive
d)by recording changes in climate patterns

Option (B)

Explanation:

Geologists have determined the interior of the earth from the study of the behavior of seismic waves. These waves are the primary and the Secondary waves and these waves carry energy when propagates through the interior of the earth.

The P waves move in the crust, mantle and the core (both inner and outer core), and during propagation, the speed of these waves is affected and their path changes or gets deviated. The S waves move only in the crust and mantle and get dissolve at the core-mantle boundary. These waves also gets reflected and refracted at the distinct boundaries.

This behavior of waves helped the geologists to determine the crust-mantle boundary, core-mantle boundary, inner core-outer core boundary, and also the changes in their composition and density of the layers.

Thus, the correct answer is option (B).

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