Bilaterally symmetrical animals have a . A) nerve net. B) centralized nervous system. C) diffuse nervous system. D) a nervous system with ten brains. E) nervous system that senses chemicals only. g

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.

To kill bacteria from our body especially from stomach