Identify the correct order in which breast cancer develops.

This is the correct order in which breast cancer develops:
1. mutation of normal cells - something has to lead to cancer developing
2. tumor growth - there are more and more tumorous cells 
3. invasion of tissues - more and more tissues and organs become infected
4. metastasis - the formation of new tumors
5. metastatic tumor

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.