Living systems are organized in levels according to their structures and functions.
-> tissues-> organs -> organ systems-> organisms -> ecosystems
Which word is missing from the organized chart above
A. Cells
B. Water
C. Bacteria
D. Protons

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.

The correct answer is c