Earthquakes produce three types of seismic waves: primary waves, secondary waves, and surface waves. Each type moves through materials differently. In addition, the waves can reflect, or bounce, off boundaries between different layers.
Answer:
The Earth is formed from space gas, dust, and other galactic materials. Like the other planets in the Solar System, the Earth was created when material that orbited the early Sun began to accumulate into a spherical body.
Explanation: Hope this help
C) 30 miles is the correct answer
(I’m not sure but I think so)
