A subordinating conjunction is a conjunction that introduces a subordinate clause. For example although, because, etc. So the correct answer is because.
Hope this helps! :)
Jenna lives in Jenkinsville, which is such a quaint little town.
1. under - sub
2. beyond - ultra
3. bend - flect
4. all - omni
5. touch - tac
6. within - intra
7. lead - duct
8. burst - rupt