what is a monomer? a. it is the same thing as a macromolecule b. it is the entire structure of a macromolecule c. it is multiple units of a macromolecule that are bonded together d. it is the building block or single unit of a macromolecule

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.