What is the difference between cleavage furrow and enzymes

Cleavage Furrow is where the indentation of a cell begins to split into two cells.
Enzyme is produced by an organism that acts as a catalyst to cause a biochemical reaction

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.