Examine the words and/or phrases below and determine the relationship among the majority of words/phrases.
Choose the option that does not fit the pattern.
fire
overgrazing of lands
ground cover alteration
drought

Overgrazing of lands; it is the only density dependent factor

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.