In the study of earthquakes, which type of seismic body wave travels the fastest and is capable of propagating through both solid rock and liquid layers, such as the Earth’s outer core?

Explanation:

Primary waves (P-waves) are compressional waves that move fastest among seismic waves. Unlike Secondary (S) waves, which are shear waves and cannot pass through liquids, P-waves can travel through all states of matter, including the liquid outer core of the Earth.