Curvatures of the spine serve the body by . A. limiting the flexibility of the spine and preventing hyperextension
B. applying greater pressure to the intervertebral disks
C. preventing them from slipping
D. giving additional springiness and flexibility to the spine which absorbs shock providing space for soft organs in the various body cavities

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.

Ithink its c hope it : )

Enzyme. anything that ends in "ase" is usually an enzyme.