Which waves are used to study Earth's interior? *

Seismic waves travel outward in all directions from where the ground breaks and are picked up by seismographs around the world. Two types of seismic waves are most useful for learning about Earth's interior.

Explanation:

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Seismic waves travel outward in all directions from where the ground breaks and are picked up by seismographs around the world. Two types of seismic waves are most useful for learning about Earth's interior.

Explanation:

*can i be the brainliest*

a and b because with the other three, they simplify to something else.

c. 2,000 bce

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