How can I change my username ?

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;

answer: all : )

explanation:

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 biotechnology;