In general, the cranium of homo erectus has a high vertical forehead is composed of delicate, thin bone has no brow ridges is virtually identical to that of modern humans none of these

None of these is the correct answer.
The cranium of Homo erectus has a pentagonal shape when viewed from behind. The face of H.erectus was large with a low, forehead and a massive brow ridge. Skull was long with sharp angles at the rear, which is different than the skull in modern humans. Bones of the skull were very thick and formed a small central ridge called midline keel.

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.

Silicon is cut into tiny pieces for computer chipslead is melted to form pelletsliquid water freezes to form ice