The is the area of the planet where organisms live, including the ground, air, and water.

lithosphere
stratosphere
geosphere
biosphere

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this

answer; benefit; harmed;