Where did you get the evidence about earth structure?

Evidence about Earth's structure comes from various scientific methods, including seismic wave studies, which analyze how waves travel through different layers of the Earth during earthquakes. Additionally, data from volcanic activity and samples from mantle drilling projects provide insights into the composition and behavior of the Earth's interior. Geological studies, mineral physics experiments, and comparisons of magnetic and gravitational fields also contribute to our understanding of Earth's layered structure.