Scientists<span> can tell by observing the seismic waves that are recorded all over the surface of the </span>earth<span> from distant earthquakes. The seismic waves are reflected (bounced off) </span>layers<span> of different density, and they are refracted (bent) when they enter </span>layers<span> of different density.</span>
I feel like it’s C I don’t even know but I just have a feeling that is C
Answer:
a
Explanation:
well i picked b and it was wrong so it seems like the right answer
