Answers:
(A) Earthquake Waves
Earthquake waves/Seismic waves are waves of energy that move through the Earth's layers and are a consequence of earthquakes, volcanic eruptions, magma movement, large landslides and large man-made bursts that give out low-frequency acoustic energy.
(B) Granite
Granite is a natural type of felsic untimely igneous rock that is granular and phaneritic in texture. Granites can be predominantly white, pink, or grey in colour, depending on their mineralogy. The word "granite" originates from the Latin granum, a grain, in evidence to the coarse-grained structure of such a holocrystalline rock.
(C) Core
The Earth's core is the piece of Earth in the centre of our planet. It has a solid inner core and a liquid outer core. The outer core of the Earth is a liquid cover about 2,260 kilometres deep. It is composed of iron and nickel. The inner core of the Earth, as identified by seismology, is a solid circle about 1,216 km (760 mi) in radius, or about 70% that of the Moon.