A subordinating conjunction is a conjunction that not only joins two sentences together but also acts as the link for the two clauses in such a way that the informative value of the whole sentence is made whole. This type of conjunction links a dependent clause with an independent clause.
In the sentence "I hopped on one foot while I pulled off the wet sock", the word <u>"WHILE" acts as the subordinating conjunction</u>. It helps join the two clauses together and also adds informational value to the first clause.
Thus, the correct answer is a subordinating conjunction.
