The Athensphere is not a layer in the Earth. The asthenosphere is the region of the mantle that is capable of moving by convection and has been linked to the movement of the tectonic plates (the lithosphere).
LithospereAthenspereMesospherethink of l.a.m.
I only know it needs high temperature and pressure. as for the third one. it could be, it needs to be in the athensphere so it can reach these high standerds. thats all i can remember from science class so GOOD LUCK.