Report on your research by identifying the following: name of each the algae
category each falls under
where are each mostly found and what conditions they need to survive
whether each is unicellular or multicellular

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