What is the difference between velocity and acceleration? A. Acceleration only occurs when speed changes.
B. Velocity is speed in a certain direction. Acceleration is a change in velocity.
C. Velocity tells the amount of acceleration an object is experiencing.
D. Velocity is a change in acceleration. Acceleration is velocity in a certain direction.

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.