This law states that in an undisturbed rock sequence, the oldest layers are on the bottom and each successive layer is younger than the one underneath it. "sedimentary layers are deposited in a time sequence, with the oldest on the bottom and the youngest on the top."

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.