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What is the most important source for obtaining reliable information about the Earth’s internal structure?
Seismology, the study of seismic waves, is the most reliable source of information regarding the Earth’s interior. As P and S waves travel through the Earth, they change speed and direction (refract) when they encounter different densities and states of matter. This allows scientists to map the crust, mantle and core layers accurately. ANSWER: (C) Seismology
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