The breakup of pangea caused climate changes that caused organisms to adapt or die off, this occured during the paleozoic era.

FALSE.  very FALSE.
(Although I personally don't believe any of the evolution type stuff, if you want a good grade, pick false)

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.