Answer:
how seismic waves help in understanding the inside of the earth?
•Knowing how the waves behave as they move through different materials enables us to learn about the layers that make up the Earth. Seismic waves tell us that the Earth's interior consists of a series of concentric shells, with a thin outer crust, a mantle, a liquid outer core, and a solid inner core.
why is disaster preparedness everyone's responsibility?
•Being prepared can reduce fear, anxiety, and losses that accompany disasters.
