Answer:
The italicized clause is an adverb clause.
Step-by-step explanation:
This is an example of the use of a subordinate clause which is also an adverb clause, this kind of clauses provide additional information that could be either describe a noun in the main sentence or to give further information, the word that is acting as a subordinating conjunction is "While" this is adding extra information that can not be used independently from the main sentence.