Respuesta :
					                   I am thinking the rock that forms from lava that cools quickly is D) Obsidian.
					                
					                
					             
					                   D: Obsidian. 
It is a type of glass that is made from lava cooling very quickly. unlike the obsidian granite cools slowly to form a light-coloured rock while the obsidian formes a black coloured glass type rock.
					                
					             It is a type of glass that is made from lava cooling very quickly. unlike the obsidian granite cools slowly to form a light-coloured rock while the obsidian formes a black coloured glass type rock.
 
					                  