The Red Sea marks a boundary between two tectonic plates that are moving apart. What name is given to this type of plate tectonic boundary?

i think that d. wind is the answer.   i missed the question when i answered a. currents.

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