Here are the matches for the rocks with their correct types:
- obsidian - extrusive igneous
- granite - intrusive igneous
- conglomerate - clastic sedimentary
- evaporite - chemical sedimentary
- coal - organic sedimentary
- marble - metamorphic
So, in summary:
- obsidian - extrusive igneous
- granite - intrusive igneous
- conglomerate - clastic sedimentary
- evaporite - chemical sedimentary
- coal - organic sedimentary
- marble - metamorphic