Most organisms make ATP using glucose and oxygen during the process of cellular respiration. Which is the MOST LIKELY explanation for what prevents Earth from running out of oxygen? - Photosynthesis generates oxygen
- Cellular Respiration doesn't account for that much oxygen use
- Oxygen is available deep in the ocean at hydrothermal vents
- All of the above

Ithink due to shortage of water

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.